John worked out the problem below but got the wrong answer:
X + 18 < 22
X + 18 + 18 < 22 + 18
X<40
Explain his mistake and correct the problem for him.
Your answer:
Answer:
Step-by-step explanation:
He added 18 on both sides instead of subtracting 18 on both sides
X+18-18<22-18
X<4
PLEASE I NEED HELP EVEN IF ANSWERED
Rewrite
5^2=25
as a logarithmic equations
Answer:
Step-by-step explanation:
Take the log of both sides:
log (5^2) = log 25, or
2 log 5 = log 25 or 2 log 5
Note that 5^2 = 25 is always true.
Which describes why digital signals are a more reliable way to encode and transmit information than analog signals? Multiple choice question. Noise builds up on digital signals only when the signals travel long distances. Noise is easily filtered out without damage to the original signal because only one of two values is expected. Noise is easily filtered out without damage to the original signal because a narrow range of values is expected. Noise does not build up on digital signals when they are transmitted, unlike analog signals.
The solution is Option B.
Noise is easily filtered out without damage to the original signal because a narrow range of values is expected
What are digital signals?A digital signal encodes data as a sequence of discrete values. A digital signal can only have one value from a finite set of possible values at any given time. A signal which is a discrete function of time, i.e. non-continuous signal, is known as digital signal. Digital computers and digital phones are some of the examples of digital signals
The three types of digital signals are
Continuous-Time/Analog Signal
Discrete-Time Signal
Digital Signal
Given data ,
The digital signals are a more reliable way to encode and transmit information than analog signals
Because , while transmitting information through digital signals , they have less interference over long distances and digital signals offer better clarity
The digital devices only record pieces of sound waves, not full waves.
Now , Analog technology stores information as sound waves; digital technology stores it as strings of ones and zeroes.
Hence , noise is easily filtered out without damage to the original signal because a narrow range of values is expected
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what is the y-intercept of a line that passes through the points (2, -2.5) and (4, -2)?
Answer:
Step-by-step explanation:
To find the y-intercept, we can use the slope-intercept form of a linear equation which is y = mx + b, where m is the slope of the line, and b is the y-intercept.
Since the line passes through the points (2, -2.5) and (4, -2), we can use the point-slope form of a linear equation, which is y - y1 = m(x - x1), where (x1, y1) is a point on the line and m is the slope of the line.
To find the slope(m) we can use the rise over the run formula ,
m = (y2 - y1) / (x2 - x1) = (-2 - (-2.5)) / (4 - 2) = -0.5
then we can substitute the values in point-slope form
y - (-2.5) = -0.5 (x - 2)
And now we can use x = 0,
y = -0.5(0-2) -2.5 = 1.5
so the y-intercept of the line is 1.5
The following are the ages (years) of 5 people in a room:
13, 13, 19, 23,19
A person enters the room.
The mean age of the 6 people is now 21.
What is the age of the person who entered the room?
Answer:Answer:
the added person age is 26
Step-by-step explanation:
let the added person age is A
the six person mean is (23+19+12+21+13+A)/6=19
=> 88+A/6=19
=>A=(19×6)-88
there fore A=26
Answer:
39
Step-by-step explanation:
13 + 13 + 19 + 23 + 19 + x = 21
6
Combine like terms
(87 + x) / 6 = 21 Multiply both sides by 6
(87 + x ) = 21 * 6
87 + x = 126 Subtract 87 from both sides
x = 126 - 87
x = 39
The 6th person entering the room was 39
please help me with this!!
Answer: The answer is no, they are not proportional
Step-by-step explanation:
Let, third proportional is x 0.8 : 0.2 : : 0.2 : x = 0.8/0.2 = 0.2/x = x = 0.2 × 0.2/0.8 × 10 = 1/20 = 0.05 Hence, here third proportional is 0.05
The number of students at the start of the week that had a late library book was 200 students. By the end of the week there were only 80 students with a late library book? Is it a increase or decrease in by what percentage? 
On solving the provided question, we can say that - so, percentage - 400/500 X 100 = 80%
What is percentage?A percentage in mathematics is a figure or ratio that is stated as a fraction of 100. The abbreviations "pct.," "pct," and "pc" are also occasionally used. It is frequently denoted using the percent symbol "%," though. The amount of percentages has no dimensions. With a denominator of 100, percentages are basically fractions. To show that a number is a percentage, place a percent symbol (%) next to it. For instance, if you correctly answer 75 out of 100 questions on a test (75/100), you receive a 75%. To compute percentages, divide the amount by the total and multiply the result by 100. The percentage is calculated using the formula (value/total) x 100%.
here,
total is 500
obtained is 400
so, percentage - 400/500 X 100 = 80%
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What is the volume of a
rectangular prism that has
a height of 3 inches, a
length of 7 inches, and a
width of 4 inches?
Answer:
84in
Step-by-step explanation:
d minus 2 = 4.6 please help meeee im not good at mathhh
[tex]d-2=4.6[/tex]
Add 2 to both sides:
[tex]d-2+2=4.6+2[/tex]
[tex]\fbox{d = 6.6}[/tex]
Please help quickly
ES=____ units.
Round your answer to the nearest tenth.
ES is 8√2 units from the given graph.
What is Graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points.
The given two points from the graph are S(4, 4) and E(-4, -4)
We need to find ES which means the distance between two points in units.
The length along a line or line segment between two points on the line or line segment.
Distance=√(x₂-x₁)²+(y₂-y₁)²
√(-4-4)²+(-4-4)²
√(-8)²+(-8)²
√64+64
√64×2
8√2 units.
Hence, ES is 8√2 units from the given graph.
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Please answer the question below
In March 2012, film director James Cameron climbed inside the Challenger Deep and descended into the deepest part of the Pacific Ocean, the Mariana Trench. After 12hour, the craft was approximately 2,750 meters beneath the ocean surface. Which equation describes the depth of the Challenger Deep in relation to sea level after 1 hour if they continue to descend at the same rate?
Answer:
hey guys!! answer is B!!
Step-by-step explanation
hope this helps!
Answer:
b give brainest
Step-by-step explanation:
Find the exact value of sin 0 if cos 0=-2/3 and 90º < 0 < 180°
Answer:
sin (theta) = [tex]\frac{\sqrt{5} }{3}[/tex]
Step-by-step explanation:
cos = adjacent side/hypotenuse
Then, in a right triangle the adjacent = 2 and the hypotenuse = 3
By the Pythagorean theorem, 3^2 = 2^2 + opposite side^2
9 - 4 = 5
opposite side = [tex]\sqrt{5}\\[/tex]
sin (theta) = [tex]\frac{\sqrt{5} }{3}[/tex]
An easier way is to find sin(arccos (-2/3) = [tex]\frac{\sqrt{5} }{3}[/tex]
Note: Remember that the sin is positive in the 2nd quadrant.
Do anybody know what this is need to do this by today D=29m
Your bike was originally purchased for $1,200. It loses about 8% of its original value each year. Write an equation to represent this exponential function with appropriate values.
Answer:
y= 1200(0.92)^x
Step-by-step explanation:
Given data
Cost price= $1200
Rate of decrease= 8%
Let the time be x
The expression that describes an exponential function is
y= ab^x
for decrease b= 1-r
y= 1200(1-0.08)^x
y= 1200(0.92)^x
Hence the expression is
y= 1200(0.92)^x
Simplify.
8-3(4-2x)
i’ll mark brainliest :)
Answer:
A. 6x - 4
Step-by-step explanation:
[tex]\sf 8-3(4-2x)[/tex]
Distribute:-
[tex]\sf 8+(-3)(4)+(-3)(-2x)[/tex]
[tex]\sf 8+-12+6x[/tex]
Combine Like Terms:-
[tex]\sf (6x)+(8+-12)[/tex]
[tex]\sf 6x+-4[/tex]
** + * - = -**
[tex]\sf 6x-4[/tex]
Therefore, option A. 6x - 4 is your answer!
_____________________
Hope this helps!
Have a great day!
Jessica and Josh are selling entertainment books to raise money for the art room after school one book sells for $18 Jessica receive the prize for selling the most books in the school Jessica sold 13 times more books than Josh together they sold 280 books how many did each of them sell
Based on the question above, Jessica sold 260 books and Josh sold 20 books.
What is the math equation about?Let x be the number of books Josh sold
We know that:
Jessica sold 13x books
Together they sold 280 books
So we can set up an equation:
x + 13x = 280
14x = 280
x = 20
Josh sold 20 books
Jessica sold 13 * 20 = 260 books
Therefore Jessica = 260 books sold and Josh = 20 books sold.
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Someone please help!!! Due tonight, I’ll give brainliest!!!
Answer:
2 * 0.75 + 0.50 + 4 * 1.25
$7.00
Step-by-step explanation:
Expression
2 * 0.75 + 0.50 + 4 * 1.25
Evaluate
1.50 + 0.50 + 5.00
$7.00
witch are linear and witch are not linear!?
Step-by-step explanation:
a linear relationship or function is described by
y = ax + b
that means that the difference from one y value to the next is defined by a constant ratio of y diff / x diff.
so, the first one is not linear.
because the difference ratios are not constant :
(1-0)/(1-0) = 1
(4-1)/(2-1) = 3
(9-4)/(3-2) = 5
the second one is linear.
the difference ratios are constant :
(1-0)/(1-0) = 1
(4-1)/(4-1) = 1
(9-4)/(9-4) = 1
the third one is not linear.
the difference ratios are not constant :
(3-1)/(3-2) = 2
(9-3)/(4-3) = 6
(27-9)/(5-4) = 18
the fourth one is linear.
the difference ratios are constant :
(5-1)/(4-2) = 4/2 = 2
(9-5)/(6-4) = 4/2 = 2
(13-9)/(8-6) = 4/2 = 2
Water in a swimming pool is treated with two chemicals mixed in the ratio of 5: 4. The total volume of the chemicals is 48 litres. How much of each chemical is used?
What is the sum
No links please
Answer:
Step-by-step explanation:
he total amount resulting from the addition of two or more numbers, amounts, or items
Answer:
(2/5x+1/5x)+(5/8-1/4)
3/5x+(5/8-2/8)
3/5x+3/8
A line on a coordinate plane has a y-intercept of 5 and a slope of 3.what is the slope intercept form of the line?
Answer:
y = 3x + 5
Step-by-step explanation:
Slope intercept form is
y = mx + b
where m is the slope and b is the y-intercept
Given m = 3 and b = 5
y = 3x + 5
I need help with this..there’s an image attached!
Solve the equation.
4(x + 2) = 40
Answer:
X=9
Step-by-step explanation:
4x+8=40
4x=40-8
4x=32
X=9
Answer:
[tex]\small\mathfrak\green{here \: is \: your \: solution...} \\ \\ \small\mathfrak\green{4(x + 2) = 40} \\ \\ \small\mathfrak\green{4x + 8 = 40} \\ \\ \small\mathfrak\green{4x = 40 - 8 } \\ \\ \small\mathfrak\green{4x = 32} \\ \\ \small\mathfrak\green{x = 32 \div 4} \\ \\ \small\mathfrak\green{x = 8}[/tex]
[tex]\small\boxed{\mathfrak{ Hope \: it \: helps ....}}[/tex]
May someone help me please ? I don't really understand this, and I need it turned in.
9514 1404 393
Answer:
x^2 +y^2 +6x -18y +65 = 0
Step-by-step explanation:
The short of it is that you're being asked to rewrite each of these standard-form equations into general form: f(x,y) = 0.
It can save you a little effort if you recall that the square of a binomial is ...
(a +b)² = a² +2ab +b²
Otherwise, you would use the distributive property to get ...
(a +b)(a +b) = a(a +b) +b(a +b)
= a² +ab +ab +b²
= a² +2ab +b²
__
For the given equation, expanding the squares gives ...
(x +3)² +(y -9)² = 5²
(x² +6x +9) +(y² -18y +81) = 25 . . . . . expand the squares
x^2 +y^2 +6x -18y +65 = 0 . . . . . . . . subtract 25; put in order of decreasing powers of the variables
A square rug has an area 44ft. Power of 2Write the side length as a square root. Then decide if the side length is a rational number.
Answer: [tex]2\sqrt{11}\ ft[/tex], Irrational number
Step-by-step explanation:
Given
The square rug has an area of [tex]44\ ft^2[/tex]
The area of the square rug is [tex]\left( \text{Side length}\right)^2[/tex]
Suppose the side length is [tex]x[/tex]
[tex]\therefore x^2=44\\\Rightarrow x=\sqrt{44}\\\Rightarrow x=2\sqrt{11}\ ft[/tex]
As [tex]\sqrt{11}[/tex] is irrational, therefore, [tex]2\sqrt{11}[/tex] is not a rational number.
Solve.
7 Jordan shoots 100 3-point shots per basketball practice.
She makes 44 of these shots. What decimal represents the
number of shots she makes?
8 At a county fair, 9 people out of 1,000 earned a perfect score
in a carnival game. What decimal represents the number of
people who earned a perfect score?
Answer:
7. .44
8. .009
Step-by-step explanation:
7. 44 ÷ 100 = .44
8. 9 ÷ 1000 = .009
There are 9 red, 5 yellow, and 7 green jellybeans in a jar. Without replacement what is the probability of choosing a green jellybean followed by a red jellybean?
Answer:
3/14 chance first draw
Step-by-step explanation:
There are 14 jellybeans in all, you won’t be replacing so the probability will change with each draw.
Probability the 1st draw is red = 3/14.
Probability the 2nd draw is red = (3–1)/(14–1) = 2/13.
Probability the 3rd draw is red = (2–1)/(13–1) = 1/12.
3/14 x 2/13 x 1/12 = 6/2184 = 1/364 is approximately 0.27%, pretty rare.
help me solve this please
Answer:
g=44°
k=70°
h= 136°
m= 110°
Answer:
h= 136°
g=44°
m= 110°
k=70°
Step-by-step explanation:
Have a nice day!
ANYONE PLEASE HELP !!!
Answer:
2x^2+1
Step-by-step explanation:
4x^2+2-2x^2-1
Group like terms:
4x^2-2x^2+2-1
2x^2+2-1
2x^2+1
Answer:
2x^2 + 3
Step-by-step explanation:
Subtracting functions is similar to subtracting normal numbers. An easy way to do it is to put one over the other and then combine like terms.
4x^2 + 2
- 2x^2 - 1
= 2x^2 + 3
Even though it looks like you would do 2-1, the three is because you're adding -(-1) (aka 1) to 2.