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ololo11 [35]
2 years ago
13

The function below represents the monthly charges for a cell phone, where is the number of

Mathematics
1 answer:
erma4kov [3.2K]2 years ago
4 0

Answer:

$25

Step-by-step explanation:

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If y varies directly as the x^2 and y = 200 when x = 5, what is the value of y when x = -3?
gayaneshka [121]
As the variation is direct we have:
 y = kx ^ 2

 We must find the value of k.
 For this, we use the following data:
 y = 200 when x = 5
 Substituting values we have:
 200 = k5 ^ 2

 Clearing k:
 k = 200/5 ^ 2

k = 200/25

k = 8
 Then, the function is:
 y = 8x ^ 2

 We evaluate the function for x = -3
 y = 8 (-3) ^ 2

y = 8 (9)

y = 72
 Answer:
 the value of y when x = -3 is:
 c.
 
72
6 0
3 years ago
Find the slope intercept form of the equation of the line that’s has the given properties (1 , 3) m=1/4
Helga [31]

Answer:

y = 1/4x + 11/4

Step-by-step explanation:

Given the slope, m = 1/4, and the point, (1, 3):

We can substitute these values into the slope-intercept form, y = mx + b, in order to solve for the y-intercept.  

The y-coordinate (b) of the point, (0, <em>b </em>) is the <u>y-intercept </u>of the line where the graph of the linear equation crosses the y-axis. The y-intercept is also the value of y when x = 0.

y = mx + b

3 = 1/4(1) + b

3 = 1/4 + b

Subtract 1/4 from both sides:

3 - 1/4 = 1/4 - 1/4 + b

11/4 = b

The y-coordinate, b, of the y-intercept is 11/4.

Therefore, the slope-intercept form is: y = 1/4x + 11/4

Please mark my answers as the Brainliest if you find this explanation helpful :)

4 0
2 years ago
Can you give me the answers to to the math vocabulary words?
anastassius [24]
9erhfcyrwwweuecehnavchefvbjbeaw
5 0
2 years ago
What are the two solutions?
Readme [11.4K]

Answer:

A

Step-by-step explanation:

really ? you need help to calculate the 2 results of

(2 ± 6) / 2

?

one result is

(2 + 6) / 2 = 8/2 = 4

the other result is

(2 - 6) / 2 = -4/2 = -2

there ! that is all there is to it.

is there still something unclear ?

4 0
2 years ago
I need help with making predictions with probability please help me correctly answer these questions.
Semmy [17]

Answer:

1. So the porpotion should be 25/100 = x/120

You have this because you know that 25% of the dogs who go to ABC veterinarian need a rabies booster. So 100% of the dog should be 120 dogs, and now our job is to find how many dogs make up 25% percent of the total number.

According to our porpotion, we have:

(120 . 25)/100 = 30 (dogs)

Another way of understanding this is that you have to find 25% of the total amount, so just take that total number and multiply it with 25% or 25/100 which is 0.25 as well, that's why we multiply it with 25 first and then divide it to 100 later.

2.

*I guess there is no need of explaining it

0.9 × 550 = 495

6 0
3 years ago
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