The sum of two numbers is 11. Twice the greater number minus the lesser number is 7. What
is the greater number?
A.12
B.6
C.7
D.5

Please provide some mathematical explanation. Thank you.

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?