A car travels 90 miles in 1.5 hours. How many miles will it travel in 5 hours if its speed remains the same?

3000 miles

Step-by-step explanation:

Given the car travels

900 miles = 1.5 hrs

With the same speed,How many miles will it travel in 5 hours.

Let the miles travelled in 5 hours be A

Therefore

900 miles = 1.5hrs

A miles = 5 hours

Cross multiply

A x 1.5 = 900 x 5

A x 1.5 = 4500

Divide both sides by 1.5

A x 1.5/1.5 = 4500/1.5

A = 3000

A = 3000 miles

The car will travel 3000 miles in 5 hours at the same speed

answer: i think it is (1,-2)

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240