Sam is trying to lose weight and george is trying to gain weight. sams weight in pounds can be represented by the function f(x)=240-2x, where x is the number of weeks since sam started losing weight. george's weight since sam started losing weight. george's weight in pounds can be represented by the function g(x)=180+4x, where x is the number of weeks since george starting gaining weight. what is the x value when f(x)=g(x)?

x=10

Step-by-step explanation:

Given : Sams weight in pounds can be represented by the function , where x is the number of weeks since Sam started losing weight.

George's weight in pounds can be represented by the function  , where x is the number of weeks since George starting gaining weight.

When

To find x, first we add 2x on both sides , we get

Subtract 180 from both sides , we get

Divide both sides by 6, we get

or

Hence, the required value of x=10.

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

d≈7.07in

step-by-step explanation: