Nia plans to put enough money in the bank each week for 100 weeks so that the amount in the bank is always proportional to the week number. On week 8, she had $20.00. On week 12, she had $30.00. How much money will be in the savings account on week 100? A line graph titled Nia's Savings has week number on the x-axis, and Amount in Savings on the y-axis. At week 8 she had 20 dollars, at week 12 she had 30 dollars.

On week 100 she has $250.

Step-by-step explanation:

A proportional relation has the form

y = kx

Let x = week number and y = amount of money in the account.

We use one of the known times and mounts to find the value of k.

At week 8 she had $20.00, so for x = 8, y = 20.

y = kx

20 = k * 8

k = 20/8

k = 2.5

The proportional relation is

y = 2.5x

Now for any number of weeks, x, you can find the amount of money, y, using the equation above.

On week 100, x = 100.

y = 2.5x

y = 2.5(100)

y = 250

On week 100 she has $250.

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x