Answers
Answer:
x=6
Step-by-step explanation:
2x - 5 = 7
Add 5 to each side
2x-5+5 = 7+5
2x= 12
Divide by 2
2x/2 = 12/2
x = 6
Answer:
x = 6.
Step-by-step explanation:
2x - 5 = 7
2x = 7 + 5
2x = 12
x = 6
Check your work!
2 * 6 - 5 = 7
12 - 5 = 7
7 = 7
Hope this helps!
Related Questions
Which statements are true regarding the system of equations? Check all that apply. 8 x + 10 y = 30. 12 x + 15 y = 60. The lines coincide. The lines are parallel. The slopes are equal. The y-intercepts are different. The system has one solution. The system has an infinite number of solutions. The system has no solution. Mark this and return
Answers
Answer: The lines are parallel.
The slopes are equal.
The y-intercepts are different.
The system has no solution.
Step-by-step explanation:
For a pair of equations: [tex]a_1x+b_1y=c_1\\\\a_2x+b_2y=c_2[/tex]
They coincide if [tex]\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}[/tex]
They are parallel if [tex]\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}\neq\dfrac{c_1}{c_2}[/tex]
They intersect if [tex]\dfrac{a_1}{a_2}\neq\dfrac{b_1}{b_2}[/tex]
Given equations: [tex]8 x + 10 y = 30\\ 12 x + 15 y = 60[/tex]
Here,
[tex]\dfrac{a_1}{a_2}=\dfrac{8}{12}=\dfrac{2}{3}\\\\ \dfrac{b_1}{b_2}=\dfrac{10}{15}=\dfrac{2}{3}\\\\ \dfrac{c_1}{c_2}=\dfrac{30}{60}=\dfrac{1}{2}[/tex]
⇒[tex]\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}\neq\dfrac{c_1}{c_2}[/tex]
Hence, The lines are parallel.
It has no solution. [parallel lines have no solution]
Write 8 x + 10 y = 30 in the form of y= mx+c, where m is slope and c is the y-intercept.
[tex]y=-\dfrac{8}{10}x+\dfrac{30}{10}\Rightarrow\ y=-0.8x+3[/tex]
i.e. slope of 8 x + 10 y = 30 is -0.8 and y-intercept =3
Write 12 x + 15 y = 60 in the form of y= mx+c, where m is slope
[tex]y=-\dfrac{12}{15}x+\dfrac{60}{15}\Rightarrow\ y=-0.8x+4[/tex]
i.e. slope of 12 x + 15 y = 60 is -0.8 and y-intercept =4
i.e. The slopes are equal but y-intercepts are different.
Answer: The lines are parallel.
The slopes are equal.
The y-intercepts are different.
The system has no solution.
Step-by-step explanation:
For a pair of equations:
They coincide if
They are parallel if
They intersect if
Given equations:
Here,
⇒
Hence, The lines are parallel.
It has no solution. [parallel lines have no solution]
Write 8 x + 10 y = 30 in the form of y= mx+c, where m is slope and c is the y-intercept.
i.e. slope of 8 x + 10 y = 30 is -0.8 and y-intercept =3
Write 12 x + 15 y = 60 in the form of y= mx+c, where m is slope
i.e. slope of 12 x + 15 y = 60 is -0.8 and y-intercept =4
i.e. The slopes are equal but y-intercepts are different.
Darrin is hanging 200 feet of Christmas garland on the fencing around his house. The fence has the shape of a rectangle and fully encloses the house and its front, side and back yards. The length is 5 feet less than 5 times the width.Find the length and width of the fencing. Give the measurements in decimal form.
Answers
Answer:
the width is 17.5 feet and the length is 82.5 feet.
Step-by-step explanation:
The house has a rectangular shape and we know that the length is 5 feet less than 5 times the width.
We will call the width x, thus, the length would be represented as 5x-5 (5 less than 5 times the width).
Since Darrin is going to hang garland around the perimeter of the house, we know that the perimeter is 2 times the length plus two times the width and this equals 200.
Let's write this in algebraic form
[tex]width = x\\length= 5x-5\\Perimeter= 2width +2length=200\\200=2(x)+2(5x-5)\\200=2x+10x-10\\200=12x-10\\200+10=12x\\210=12x\\210/12=x\\x=17.5[/tex]
Therefore, the width is 17.5 feet.
Now, the length is 5x-5, thus substituting the 17.5 in this equation we have:
[tex]5x-5=5(17.5)-5=87.5-5=82.5[/tex] feet
Therefore, the width is 17.5 feet and the length is 82.5 feet.
Simplify each expression.
1) 3(8Z² - 52 - 7)
2) 8d(2d-4)
6) 6(5x - 4)
7) 6q- 4
Answers
Answer:
1) 24Z^2 - 177.
2) 16d^2 - 32d.
6) 30x - 24.
7) 6q - 4.
Step-by-step explanation:
1) 3(8Z^2 - 52 - 7)
= 3(8Z^2 - 59)
= 24Z^2 - 177
2) 8d(2d - 4)
= (8d * 2d) - (8d * 4)
= 16d^2 - 32d
6) 6(5x - 4)
= (6 * 5x) - (6 * 4)
= 30x - 24
7) Already simplified. 6q - 4.
Hope this helps!
For every 2 males birds in a birdcage, there are 5 females. What is the ratio of
males to females? *
Answers
Answer:
2:5
Step-by-step explanation:
The structure of a ratio is x:y.
So all you have to do is place the former as the first digit and the latter as the second and separate them by a colon.
2 males
5females
The ratio is rating from male to female
What is the simplified form of k-5+7
Answers
Answer:
k+2 or k=2
Step-by-step explanation:
combine -5 and 7 to get your answer
Answer:
K+2
Step-by-step explanation:
K - 5 + 7 ....add -5 and 7
K+2
Pentagon A’B′C′D′E’, is the image of pentagon ABCDE under a dilation with a scale factor of 5/2
Answers
Answer:
The length of segment A'E' is 5 units
Explanation:
From the included graph the coordinates of the points A and E, in the pentagon ABCDE with reference to point A are;
A- (0, 0)
E- (0, 2)
The length of the segment AE = √((2-0)² + (0 - 0)²) = √2² = 2
When a pentagon ABCDE is dilated to pentagon A'B'C'D'E' with a scale factor of 5/2, we have;
Length of segment A'E' = 5/2 × Length of segment AE
Therefore;
Length of segment A'E' = 5/2 ×2 = 5 units.
The length of segment A'E' is 5 units.
This question is based on distance formula.The length of segment A'E' is 5 units.
Given:
Pentagon A’B′C′D′E’, is the image of pentagon ABCDE under a dilation with a scale factor of 5/2.
From the given graph, the coordinates of the points A and E, in the pentagon ABCDE with reference to point A are;
A- (0, 0)
E- (0, 2)
The length of the segment AE = [tex]\sqrt{(2-0)^{2} +(0-0)^{2} }=\sqrt{2^{2} } =2[/tex]
When a pentagon ABCDE is dilated to pentagon A'B'C'D'E' with a scale factor of 5/2, we have;
Length of segment A'E' = 5/2 × Length of segment AE
Therefore;
Length of segment A'E' = 5/2 ×2 = 5 units.
Therefore, the length of segment A'E' is 5 units.
For more details, please refer to this link:
https://brainly.com/question/23700761
. A car bought for $20,000. Its value depreciates by 10% each year for 3 years. What is the car's worth after3 years?
Answers
Answer:
$14,580
Step-by-step explanation:
To start off, 10% of 20,000-one easy way to do this is to multiply 20,000 by 0.1, which is 10% in decimal form
-In doing that, you get 2,000
-Now the question says that the value is depreciated which means it goes down in value, so subtract 2,000 from 20,000 to 18,000
-the value of the car after one year is now $18,000
Now, let's move to the second year. This time find 10% of 18,000
-multiply 18,000 by 0.1 to get 1,800
-since the value is depreciating, or becoming less, we will subtract 1,800 from 18,000 to get 16,200
-the value of the car after two years is now $16,200
Finally, let's look at the value of the car after three years. Only this time, we will now find 10% of 16,200
-multiply 16,200 by 0.1 to get 1,620
-since value is being depreciated, or lessened, we will once again be subtracting. Subtract 1,620 from 16,200 to get 14,580
Therefore, the value of the car after three years is now $14,580.
Draw a diagram of this statement,
Fifteen thousand dollars was raised by the booster club. This was two thirds of
the goal.
Use your diagram to determine the percent by which the booster club fell short of their goal
Answers
Answer:
The percentage by which the booster club fell short is 33% as shown on the chart
Step-by-step explanation:
To represent the given data pictorially, a pie chart is suitable
The circumference of the pie chart will represent the amount to be raised by the booster club and a sector of the circle which is two-thirds of the circumference represents the amount raised
Given that the amount raised = 2/3×Goal = $15,000, we have;
We represent the amount raised as a sector of the circle as follows;
Sector angle = 2/3×360° = 240°
Total sector of goal amount = Entire circle = 360°
Amount club fell short = 360° - 240° = 120°
The goal amount = 3/2 × $15,000
Percentage by which the club fell short = 120/360×100 = 1/3×100 = 33.33%
2 sin(2theta)
_______________
(1 + cos(2theta)) (1 –tan^2theta)
Answers
Answer:
For numerator
2sin(2∅)=2(2sin∅cos∅)
For Denominator
(1+cos(2∅))(1+tan²∅)
=(1+cos(2∅))(sec²∅)
=(1+cos²∅-sin²∅)(sec²∅)
Recall. 1-sin²∅=cos²∅
=2cos²∅(sec²∅)
=2.
Answer is...
2(2sin∅cos∅)/2
=2sin∅cos∅ or sin(2∅)
simplify:
[tex](2x) ^{ \frac{1}{2} } \times (2x ^{3} ) ^{ \frac{3}{2} } [/tex]
Answers
Answer:
[tex]\huge\boxed{(2x)^\frac{1}{2}\times(2x^3)^\frac{3}{2}=4x^5}[/tex]
Step-by-step explanation:
[tex](2x)^\frac{1}{2}\times(2x^3)^\frac{3}{2}\qquad\text{use}\ (ab)^n=a^nb^m\\\\=2^\frac{1}{2}x^\frac{1}{2}\times2^\frac{3}{2}(x^3)^\frac{3}{2}\qquad\text{use}\ (a^n)^m=a^{nm}\\\\=2^\frac{1}{2}x^\frac{1}{2}\times2^\frac{2}{3}x^{(3)(\frac{3}{2})}=2^\frac{1}{2}x^\frac{1}{2}\times2^\frac{2}{3}x^\frac{9}{2}\\\\\text{use the commutative and associative property}\\\\=\left(2^\frac{1}{2}\times2^\frac{3}{2}\right)\left(x^\frac{1}{2}\times x^\frac{9}{2}\right)\qquad\text{use}\ a^n\times a^m=a^{n+m}[/tex]
[tex]=2^{\frac{1}{2}+\frac{3}{2}}x^{\frac{1}{2}+\frac{9}{2}}=2^\frac{1+3}{2}x^{\frac{1+9}{2}}=2^\frac{4}{2}x^\frac{10}{2}=2^2x^5=4x^5[/tex]
Answer:
[tex] 4x^5 [/tex]
Step-by-step explanation:
[tex] (2x)^\frac{1}{2} \times (2x^3)^\frac{3}{2} = [/tex]
[tex]= (2x)^\frac{1}{2} \times (2x \times x^2)^\frac{3}{2}[/tex]
[tex]= [(2x)^\frac{1}{2} \times (2x)^\frac{3}{2}] \times (x^2)^\frac{3}{2}[/tex]
[tex]= (2x)^{\frac{1}{2} + \frac{3}{2}} \times x^{{2} \times \frac{3}{2}}[/tex]
[tex]= (2x)^{\frac{4}{2}} \times x^{\frac{6}{2}}[/tex]
[tex] = 2^2x^2 \times x^3 [/tex]
[tex] = 4x^5 [/tex]
Pls help ASAP will make brailist
Answers
Answer:
B. 1296 in.^2
Step-by-step explanation:
The rectangles are similar, and sides ST and YZ are corresponding sides.
The linear scale factor is k = YZ/ST = 24/8 = 3
The area scale factor is k^2 = 3^2 = 9
A = 144 sq in. * k^2 = 144 sq in. * 9 = 1296 sq in.
Answer: B. 1296 in.^2
Answer:
4)1,296in^2
5)510.4ft
Step-by-step explanation:
4)
24/8=3 This is the dilation
144/8=18 This is the side length for QRST
18*3=54 The side length for WXYZ
24*54=1296 The area of WXYZ
5)
319*8/5 Your fence with a scale factor of 8/5
319*1.6 Changing 8/5 into fraction form
319*1.6=510.4 The length of the friend's fence.
Hope this helps. I could not see the end of the last question so I am sorry if it is not written properly.
Have a good day!
Write as an algebraic expression: the product of a number and 6
i’m desperate plzzz
Answers
Answer:
6n or 6 x n
Step-by-step explanation:
Which expression is equivalent to 10 to the 4 power? A.) 10 times 10 times 10 times 10 B.) 40 C.) 4 times 4 times 4 times 4 times 4 times 4 times 4 times 4 times 4 times 4 D.) 4,444,444,444
Answers
Answer:
A
Step-by-step explanation:
Here in this question, we want to select which of the options particularly represents what was given in the question.
Mathematically 10^4 means that we are raising 10 into a continued exponential raising up to 4 times.
So 10^4 is pronounced as the first option in the question.
10 raised to power 10 , raised to power 10 etc
Match the correct property of operations to each pair of equivalent expressions so that the property can be applied to
the first expression to generate the second expression Drag the items on the left to the correct location on the right
(x+20) + 12 and 7x +(24+12)
Distributive Property
Commutate Property
x+4y-Sy and x-5y
Associative Property
21x+28y and 7(3x + 4y)
combining like terms
Ty + 6x and 6x + 7y
Answers
Answer:
Check below
Step-by-step explanation:
Hi, let's check
1.[tex](7x+20) + 12 \:and\: 7x +(24+12)\\[/tex]
In this case we have the Associate Property, since we can associate two, or even three terms without modify the final result.
2.[tex]21x+28y \:=\: 7(3x + 4y)[/tex]
Distributive Property, note that that the right side is the left side rewritten as a product, with the GCF outside the brackets.
3. Commutative Property
[tex]7y + 6x \:and\: 6x + 7y[/tex]
The order of these sum does not compromise the result.
4. [tex]x+4y-Sy \:and\: x-5y[/tex]
Combining like terms, similar terms are operated together.
Round the following numbers to 1 significant figure:
a) 25 637
b) £2.51
c)9877 m
Answers
Answer:
b
Step-by-step explanation:
you need to round 2.51 to 3 because it was the correct answer
Robert buys $3 shirts at $16.90 each, and a pair of jeans for $20.50. The shop has a sale on, and so he receives a $7.12 discount.
Write and solve a numerical expression for how much he spends in total.
Answers
Answer:
64.08
Step-by-step explanation:
3^16.90+1*20.50-7.12
Sherman entered the following values into the TVM Solver on his graphing
calculator
N=
I%=3.7
PV=-49
PMT=0
FV=98
P/Y=1
C/Y=1E11
PMT:ENU BEGIN
What does the rule of 69 predict will be the approximate value of N?
A. 13.2
B. 18.6
C. 19.5
D. 26.5
Answers
Answer:
B. 18.6
Step-by-step explanation:
The 'rule of 69' says the value will be doubled in 69/i years, where i is the annual interest rate in percent (compounded continuously). The interest rate is given as 3.7%, so the prediction is
n = 69/3.7 = 10.649
n ≈ 10.6
if you apply the changes below to the quadratic parent function f(x)=x^2.which of these in the equation of the new function? shift 1 unit right ,vertically stretch by a factor of 3,reflects over x-axis
Answers
Answer:
Transformed [tex]\,\,f(x)= -3\,(x-1)^2[/tex]
Step-by-step explanation:
The process of shifting the graph of the function 1 unite to the right can be obtained by subtracting 1 to the x-coordinate in the expression of the function:
[tex]f(x)=x^2\\new\,f(x) =(x-1)^2[/tex]
The process of stretching vertically the function, would be accomplished by multiplying now the full function by "3":
[tex]new \,\,f(x)= 3\,(x-1)^2[/tex]
the reflection over the x-axis is obtained by multiplying the full function by the constant "-1":
[tex]new \,\,f(x)= -3\,(x-1)^2[/tex]
What is the slope of the following graph? M=
Answers
Answer:
-2/3
Step-by-step explanation:
We have two points ( 0,3) and ( 3,1)
We can use the slope formula
m = (y2-y1)/(x2-x1)
= (1-3) /(3-0)
= -2/3
Answer:
-2/3
Step-by-step explanation:
Two points are given on the graph:
(0, 3) and (3, 1)
Use slope formula.
m = rise/run
m = (y₂ - y₁)/(x₂ - x₁)
x₁ = 0
y₁ = 3
x₂ = 3
y₂ = 1
m = (1 - 3)/(3 - 0)
m = -2/3
The slope of the line is -2/3.
Which expression can be used to determine the slope of the linear function represented in the table?
х
0
у
5
9
4
9-5
4-0
O
4-0
9-5
o
5-0
9-4
O
9-4
5-0
Answers
Answer:
to find the slope of a linear function, there is only one formula
this formula requires two points, which are stated in tables and graphs alike
these points do not need to be one after the other as it is slope and slope predicts what the next point graphed will be.
Formula for Slope:
y2 - y1______x2 - x1this should help. take any two points and substitute for each; y values in the correct spots and x values in their correct spots
make sure to put the values of second point where it is labelled y2 and x2 And make sure to substitute first point values in those labelled y1 and x1
It is important to remember that if this becomes a fraction, SIMPLIFY
We can write the slope of the function as -
{m} = (9 - 5)/(4 - 0).
What is function?A function is a relation between a dependent and independent variable. We can write the examples of function as -
y = f(x) = ax + b
y = f(x, y, z) = ax + by + cz
Given is a table for the function as -
{x} 0 4
{y} 5 9
We can write the slope of the function as -
{m} = (9 - 5)/(4 - 0)
Therefore, we can write the slope of the function as -
{m} = (9 - 5)/(4 - 0).
To solve more questions on functions, visit the link below-
https://brainly.com/question/30194223
#SPJ7
Find the median, mean and mode of : 0,2,2,4,4,6,6,6,6 pls show working
Answers
Answer:
Step-by-step explanation:
The median is 4, which is the middle number. If there is no middle number, get the average of the two numbers closest to the median.
The mean is 4, which is the average of all the numbers. you add all of them up and divide by how many integers there are in the list.
The mode is 6, which is the integer that is shown the most.
Answer:
mean=4
median=4
mode=6
Step-by-step explanation:
Mean: add 0+2+2+4+4+6+6+6+6=36
36/ (the amount of numbers) 9= 4
Median: cross out the numbers left to right until you get to the middle which is 4.
Mode: 6 occurred four times, which is the most out of any of the other numbers in this sequence, so the answer is 6.
Please answer ASAP. The question is down below. thanks.
Answers
Answer:
(-2,-4)
Step-by-step explanation:
The vertex of a parabola is it's lowest (or highest, but lowest in this context) point. Your lowest point is (-2,-4), so that is your answer.
What is the length of segment AB?
12
10-B
8-
6
А
2-
0
0
-10-8-6-4
- 2
2
4
6
8 10
--2-
<
05
06
O8
10
ous Question
Answers
Answer:
[tex]AB = 10 units[/tex]
Step-by-step explanation:
The line of segment AB can be calculated using distance formula, [tex] d = \sqrt{(x2 - x1)^2 + (y2 - y1)^2} [/tex] , to calculate the distance between point A(6, 2) and point B(0, 10).
A(6, 2) can be (x1, y1),
B(0, 10) can be (x2, y2)
[tex] d = \sqrt{(0 - 6)^2 + (10 - 2)^2} [/tex]
[tex] d = \sqrt{(-6)^2 + (8)^2} [/tex]
[tex] d = \sqrt{36 + 64} [/tex]
[tex] d = \sqrt{100} [/tex]
[tex] d = 10 [/tex]
The area of a rectangle is given by the expression 2x^3+5x^2-2x+3 . If the length of the rectangle is given by the expression x + 3, find the expression that represents the width
Answers
Answer:
2x^2 - x + 1
Step-by-step explanation:
This is polynomial long division:
Divide x + 3 into 2x^3 + 5X^2 - 2x + 3:
Divide 2x^3 by x = 2x^2
Multiple 2x^2 by (x + 3) = 2x^3 + 6x^2
Subtract that from 2x^3 + 5X^2 - 2x + 3 = -x^2 -2x + 3
Divide -x^2 by x = -x
Multiple -x by (x + 3) = -x^2 - 3x
Subtract that from -x^2 - 2x + 3 = x + 3
Divide x by x = 1
Multiple 1 by (x + 3) = x + 3
Subtract from x + 3 = 0
Assume that adults have it scores that are normally distributed with a mean of 100 standard deviation of 15 find probability that randomly selected adult has an Iq between 89 and 111
Answers
Answer:
0.5346
Step-by-step explanation:
Find the z-scores.
z = (x − μ) / σ
z₁ = (89 − 100) / 15
z₁ = -0.73
z₂ = (111 − 100) / 15
z₂ = 0.73
Find the probability.
P(-0.73 < Z < 0.73)
= P(Z < 0.73) − P(Z < -0.73)
= 0.7673 − 0.2327
= 0.5346
Write 59/40 as a decimal
Answers
Answer:
1.475
Step-by-step explanation:
Which transformations can be used to carry ABCD onto itself? The point of rotation is (3, 2). Check all that apply. A. Reflection across the line y = 2 B. Rotation of 180 C. Rotation of 90 D. Translation two units up
Answers
Answer: rotate 180 degrees and reflection across the line y=2
Step-by-step explan
Answer:
Step-by-step explanation:
write a compound inequality that the graph could represent
Answers
Answer:
second option
Step-by-step explanation:
Find the value of x for the triangle.
37
37
45°
45°
Answers
Answer:
[tex]x=37\,\sqrt{2}[/tex]
Step-by-step explanation:
Notice you are dealing with a right angle triangle, since one of the angles measure [tex]90^o[/tex]. Now, what you are asked to find is the hypotenuse of that triangle, given an angle of [tex]45^o[/tex] and the opposite side: 37 units. Then, we can use for example the sine function which relates opposite, and hypotenuse:
[tex]sin(45^o)=\frac{opposite}{hyp} \\hyp=\frac{opposite}{sin(45^o)} \\hyp=\frac{37}{\sqrt{2}/2}\\hyp=37\,\sqrt{2}[/tex]
please help QUICKLY! please explain your answer, please give the correct answer
Answers
Answer:
0: 0.70561: 0.26882: 0.0256Step-by-step explanation:
When events are independent, the probability of some sequence of them is the product of the probabilities of the individual events in that sequence.
The probability of a child having spina bifida is 16% = 0.16, so the probability that the child will not have the condition is 1 - 0.16 = 0.84. The probability that 0 of 2 children will have spina bifida is ...
p(0 for 2) = p(0 for 1)×p(0 for 1) = 0.84×0.84 = 0.7056
__
There are two ways that 1 of 2 children can have spina bifida: either the first one does, or the second one does. These are mutually exclusive conditions, so their probabilities add:
p(1 for 2) = p(1 for 1)×p(0 for 1) +p(0 for 1)×p(1 for 1) = 0.16×0.84 +0.84×0.16
p(1 for 2) = 0.2688
__
There is one way both children can have spina bifida:
p(2 for 2) = p(1 for 1)×p(1 for 1) = 0.16×0.16 = 0.0256
__
In summary, our probability distribution is ...
p(X=0) = 0.7056
p(X=1) = 0.2688
p(X=2) = 0.0256