Question

Please help easy math. Will give brainliest.

Luke is trying to lose weight. He currently weighs 250 lbs and is planning on losing 4 lbs a week. This can be modeled by the function
f(x) = -4x + 250. His goal is to have lost 50 lbs in 10 weeks. Is this possible? If not, what does he need to change?

A)
It is possible.


B)
It is not possible. He needs to lose at least 6 lbs a week.


C)
It is not possible. He needs to lose at least 5 lbs a week.


D)
It is not possible. He needs to lose at least 3 lbs a week.

Answer 1

Answer:

C) It is not possible. He needs to lose at least 5 lbs a week

Step-by-step explanation:

This would not be possible. To know, you have to plug 10 into the function:

• -4(10) + 250 = 210

After getting this value, ou have to take it away from 250:

• 250 - 240 = 40 → This 40 represets the valuefor the amount of pounds lost

40 is less than 50, so he would have to lose more than 4 pounds a week

To see if losing 5 pounds is enough, replace the -4 from the function with a -5:

• -4x + 250 = 210 → -5x + 250 = 210

From here plug in 10 just like the previous time:

• -5(10) + 250 = 200

From here take 200 away from 250 to find the pounds lost in 10 weeks:

• 250 - 200 = 50

50 is equal to the goal of 50 pounds, so therefore, Luke nees to lose at 5 pounds a week

I hope this helps!

Answer 2

The answer is c because 4x 10 =40 and 40 does not equal 50 do the answer would be C