his score was increased... so if he is now at 67 and it was increased by 7 so his first grade would have been 60.
The problem gives you X, so replace X witht he given vaule and solve for y:
y = -0.1x^2 + 4X
X = 40
y = -0.1(40)^2 +4(40)
y = -0.1(1600) + 160
y = -160 + 160
y = 0
Answer:
Step-by-step explanation:
Cara's brother is 7 years old.
14 is twice as much as 7 (7 * 2 = 14).
The answer is B. I hope it help :)
