Answer:
7x^(2) - 3x + 8
Step-by-step explanation:
(9x^(2) + 8) - (2x^(2) + 3x)
distribute the "-" sign.
9x^(2) + 8 - 2x^(2) - 3x
Now combine like terms; (an "x^(2)" goes with an "x^(2)", not with an "x")
9x^(2) - 2x^(2) -3x + 8
7x^(2) - 3x + 8
copy and paste the link in the download in a new tab
Answer:
lol ok
Step-by-step explanation:
Answer:
ok Y?
Step-by-step explanation:
1 The distance on the number line from a to 7 is 0.5. Which of the following could be the value of a ? A) 7.5 B) -3.5 C 0.5 D 6.5
Answer:
6.5
Step-by-step explanation:
Answer:
6.5
Step-by-step explanation:
please help me............
Answer:
38.24
Step-by-step explanation:
You need to do 45.3-7.06 and you get x
Which statement is true about the two lines whose equations are given below?
A. The lines are parallel.
B. The lines are perpendicular.
C. The lines intersect but are not perpendicular.
D. The lines coincide.
Answer: C. The lines intersect but are not perpendicular.
Step-by-step explanation:
The correct option is C, the lines intersect but are not perpendicular.
How to determine the equation of the line?To determine which statement is true about the two lines whose equations are given below:
y = 3x + 2
y = -4x + 9
We can compare the slopes of the two lines. The slopes of these lines are 3 and -4 respectively.
Two lines are parallel if and only if their slopes are equal. Since the slopes of these lines are not equal, we can eliminate options A.
Two lines are perpendicular if and only if the product of their slopes is -1. The product of the slopes of these lines is -12, which is not equal to -1. Hence, we can eliminate options B.
Since the lines are neither parallel nor perpendicular, they intersect. To determine whether they intersect perpendicularly, we can compute the angle between them using the slopes.
The angle between two lines is given by the formula:
[tex]tan \theta = \dfrac{(m_2 - m_1)}{ (1 + m_1m+_2)}[/tex]
where m₁ and m₂ are the slopes of the two lines.
Substituting the slopes of the given lines, we get:
[tex]tan \theta = \dfrac{|(-4 - 3)} { (1 + (3 \times -4))|} \\[/tex]
tanθ = 7 / 11
Therefore, the correct option is C: the lines intersect but are not perpendicular.
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The missing equation of lines are:
y = 3x + 2
y = -4x + 9
If there are 180 grams of radioactive material with a half-life (decrease by half or 50%) of 1 hour, how much of the radioactive material will be left after 3 hours?
Answer:
After 3 hours there is left 22.5 grams of radioactive material.
Step-by-step explanation:
We can calculate the mass of radioactive material remaining after 3 hours, by using the decay equation:
[tex]N_{t} = N_{0}*e^{-\lambda t}[/tex] (1)
Where:
[tex]N_{0}[/tex]: is the initial mass = 180 g
[tex]N_{t}[/tex]: is the remaining mass after time t
λ: is the decay constant
The decay constant is given by:
[tex] \lambda = \frac{ln(2)}{t_{1/2}} [/tex]
Where [tex]t_{1/2}[/tex] = 1 h.
By entering λ into equation (1) we hve:
[tex] N_{t} = N_{0}*e^{-\frac{ln(2)}{t_{1/2}} t} [/tex]
[tex] N_{t} = 180 g*e^{-\frac{ln(2)}{1 h} 3 h} = 22.5 g [/tex]
Therefore, after 3 hours there is left 22.5 grams of radioactive material.
I hope it helps you!
Do the points lie on the same line? Explain your answer.
G(3,3), H(-1,5), X(5,7)
Choose the correct answer below.
O A. The slopes of all three pairs of coordinates are not equal. Therefore, the points do lie on the same line.
OB. The slopes of all three pairs of coordinates are equal. Therefore, the points do lie on the same line.
O C. The slopes of all three pairs of coordinates are equal. Therefore, the points do not lie on the same line.
OD. The slopes of all three pairs of coordinates are not equal. Therefore, the points do not lie on the same line.
r = -5 + 19. r = ?
Please help me with this
Answer:
r = 14
Step-by-step explanation:
r = -5 + 19
Simplify the right side by subtracting 5 from 19
r = 14
A bag contains 4 red marbles and 6 blue marbles. Brandon selects one marble from the bag. Without replacing the marble he then
selects a second marble. What is the probability he selects a red marble given that he first selects a blue marble?
A)1/5
B)2/5
C3/5
D)4/15
HELP ASAP ILL GIVE BRAINLIEST
A special 8-sided die is marked with the numbers 1 to 8. It is rolled 15 times with the results shown in the table. Results 3 4 5 2 7 1 3 7 2 6 2 1 7 3 6 The experimental probability of rolling an odd number is %, which is % more than the theoretical probability.
Let us consider,
A special [tex]8-[/tex]sided die is marked with the numbers [tex]1[/tex] to [tex]8[/tex].
The odd numbers on the die are [tex]1,3,5,7.[/tex]
The even numbers are [tex]2,4,6.[/tex]
For the experimental sequence of [tex]15[/tex] rolls.
There are [tex]9[/tex] odd number out of 15, which is [tex](3,5,7,1)[/tex].
So the experimental probability is,
[tex]\frac{9}{15} =\frac{3}{5} \\\\=0.60\\[/tex]
[tex]\implies0.60=60[/tex] %
The theoretical probability given that there are odd numbers [tex](1,3,5,7)[/tex] out of [tex]8[/tex] on the dice should be [tex]50[/tex] % because [tex]\frac{1}{2}[/tex] of the numbers are prime.
Thus,
The theoretical probability is [tex]50[/tex] % .
Then,
[tex]60[/tex]%[tex]-50[/tex]%[tex]=10[/tex]%
Hence, the experimental probability of rolling an odd number is [tex]60[/tex]%, which is [tex]10[/tex] % more than the theoretical probability [tex]50[/tex]%.
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Answer:
60%, 10%
Step-by-step explanation:
Plato/Edmentum
Express 80% as a fraction or mixed number in simplest form
Answer: 4/5
Step-by-step explanation:
80%=
100% * 80/100 =
1 * 80/100=
80/100=
8/10=4/5
Consider the line y=8x-9
What is the slope of a line parallel to this line?
What is the slope of a line perpendicular to this line?
compare the line y=8x-9 to y=mx+b where m is a slope and b is y-intercept
so, the line y=8x-9 has a slope m=8
by definition, the slope of a line parallel to this line will be same, m=8
by definition, the slopes of perpendicular lines are negative reciprocals to each other; so, m = -1/8
20-34+ 8/2 =? PLS HELP ME I GIVE ALL MY POINTS.
Answer:
-10
Step-by-step explanation:
20-34=-14, 8/2 is just 4, so add 4 to -14 which = -10
the multiplicative property of
-1 1/4
Answer:
Step-by-step explanation:
1 is the answer
Liam babysat for 3 1/2 hours and made $31.50. How much money does he make per hour?
Answer:
$9 per hour
Step-by-step explanation:
31.50/3.5 = 3150/350 = 630/70 = 63/7 = 9
Hope this helps! :3
plz mark as brainliest!
I need helped with A, B and C pls i'm so stuck on it
is due by tmrw
Answer Step by Step
A. 2(6) - 5(-4) =
(12) - (-20) = 32
negative times negative equals positive
B. 4(-8) - 3(-4)
-32 - (-12) = -20
C. 3(-8) - 4 / (-4) =
(-28) / (-4) = 7
D. -4 - 3(6) / 3 - 5
(-22) / (-2) = -11
i need help simplifying this problem
Find the slope of the line.
cual de las siguientes compraraciones es correcta? a)1\8>1\2 b) 1/3<1\5 c)1\12>1\100 d)1\4>1\6
Las comparaciones correctas son (c) ( 1/12 ) > ( 1/100 ) y (d) ( 1/4 ) > ( 1/6 ).
Considere las comparaciones,
Para la opción (a),
( 1/8 ) > ( 1/2 )
Ahora, encuentre el valor de cada término en forma decimal.
( 1/8 ) = 0.125 y;
( 1/2 ) = 0.5
Por lo tanto, ( 1/2 ) > ( 1/8 )
Por lo tanto, esta opción es incorrecta.
Para la opción (b),
( 1/3 ) < ( 1/5 )
Ahora, encuentre el valor de cada término en forma decimal.
( 1/3 ) = 0.333 y;
( 1/5 ) = 0.2
Por lo tanto, ( 1/3 ) > ( 1/5 )
Por lo tanto, testa opción es incorrecta.
Para la opción (c),
( 1/12 ) > ( 1/100)
Ahora, encuentre el valor de cada término en forma decimal.
( 1/12 ) = 0.0833 y;
( 1/100 ) = 0.01
Por lo tanto, ( 1/12 ) > ( 1/100 )
Por lo tanto, esta opción es incorrecta.
Para la opción (d),
( 1/4 ) > ( 1/6 )
Ahora, encuentre el valor de cada término en forma decimal.
( 1/4 ) = 0.25 y;
( 1/6 ) = 0.1666
Por lo tanto, ( 1/4 ) > ( 1/6 )
Por lo tanto, esta opción es correcta.
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4) What is the equation of the line that passes through the points (3,0) and 2 points
(5,4)?
Your answer
What is the rate of change or slope?
Question 1 options:
m= 1/2
m=-2/1
m=-1/2 or m=-2/4
m=-2/1 or m=-4/2
Answer:
m=-1/2 or m=-2/4
Step-by-step explanation:
The rate of change or slope of the given line is [tex]m=-\frac{1}{2} or m=-\frac{2}{4}[/tex]
Given :
The graph of a line . To find out the slope or rate of change , we pick two points on the line.
Two points are (-8,2) and (4,-4)
Lets apply slope formula
[tex]Slope = \frac{y_2-y_1}{x_2-x_1}[/tex]
(-8,2) is (x1,y1)
(4,-4) is (x2,y2)
Substitute all the values inside the formula
[tex]Slope = \frac{y_2-y_1}{x_2-x_1}\\slope =\frac{-4-2}{4+8} =\frac{-6}{12} =-\frac{-2}{4} =-\frac{1}{2}[/tex]
The rate of change or slope of the given line is [tex]m=-\frac{1}{2} or m=-\frac{2}{4}[/tex]
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If EF = x + 3, FG = 3x, and EG = 7, what is FG?
Answer:
FG = 3
Step-by-step explanation:
let me know if you are still confused!
Raymond can paint 5/8 of a wall in 16 minutes. How long would it take to for him to paint 1/3 of a wall
Answer: 128/15 min or 8.5 min
i
am
right
so
trust
me
i
swear
on
my
mama
this
is
correct
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What is the value of the absolute value expression |−152| + |5| − |−24|?
179
133
−125
−173
The value of absolute value expression is equal to 133. The correct option is B.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
The absolute value or modulus of a real number x abbreviated |x| in mathematics, is the non-negative value of x regardless of its sign.
The absolute value of the function will be calculated as,
E = |−152| + |5| − |−24|
E = 152 + 5 - 24
E = 133
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the two shorter sides in a right triangle have the same length . the area of the right triangle is 7.36 square meters. what is the length of the hypotenuse
The length of the hypotenuse is 5.426 meter
Let the two shorter sides of the right angles triangle be denoted as x meters.
The formula for the area of right triangle is given as,
A = ab/2
Where, a and b are the length of the shorter sides of the triangle
Also we have been given the area of the triangle which is 7.36 sq. meter
Thus , A = 7.36
x^2/2 = 7.36
x^2 = 14.72
x = 3.84
Now according to the Pythagoras theorem,
H = √P^2 + B^2
Where, H = hypotenuse
P = perpendicular
B = base
Now putting the required values we get
H = √x^2 + x^2
= √2x^2
= x√2
= 5.426 meter
Hence the length of the hypotenuse is 5.426 meter
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WRITE THE NEXT 2 TERMS OF EACH SEQUENCE
1) 2, 6, 18, 54, __, __
2) 2, - 4, 8, - 16, __, __
3) 1, 3, 5, 7, __, __
4) 1, 2/3, 4/6, 8/9, ___, ___
Answer:
1) 2,6,18,54,162,468 (multiply by 3 each time)
2) 2, -4, 8, -16, 32, -64 (i'm not sure what this is but i'm pretty confident i'm right lol)
3) 1,3,5,7,9,11 (add 2 each time)
4) 1, 2/3 , 4/6 , 8/9 , _ _ (i'm sorry i tried my hardest but i don't know this one)
Step-by-step explanation:
hope this helped! so sorry about 4...
What is the equation is y=Mx+b form?
Answer: y=5x+ 10
Step-by-step explanation:
40-30/6-4=10/2=5
each time x moves 1 it moves 5 vertically so
4, 30
3, 25
2, 20
1, 15
0, 10
Find the volume of the shape
Answer:
The volume of cylinder is 58.2 cm³.
Step-by-step explanation:
The formula of volume of cylinder is :
[tex]v = \pi \times {r}^{2} \times h[/tex]
So, you have to substitute the values into the expressions :
[tex]let \: r = 2.1,h = 4.2[/tex]
[tex]v = \pi \times {2.1}^{2} \times 4.2[/tex]
[tex]v = 58.2 \: {cm}^{3} \: (3sf)[/tex]
4 + d = 6; 2
I need help with this answer dose am
The value of d is 2.
We are provided with the following equation,
4 + d = 6
We are supposed to find the value of d in the above equation.
To solve the equation we need to apply basic mathematical operations. The steps that need to be followed to simply this equation are mentioned below,
4 + d = 6
To get the value of d we need to subtract 4 from both the sides of this equation. On substracting 4 from both the sides of this equation, we will get
4 + d - 4 = 6 - 4
⇒ d = 6 - 4
⇒ d = 2
Thus, the value of d in the equation 4 + d = 6 is 2.
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y = -4× - 5
y = -4× + 5
6y = -24
y = -24/6
y = -4
I guess is the answer
4 - 1 1/4
A. 3 1/4
B. 3 3/4
C. 2 3/4
D. 2 1/4