Davids scores on the first three of four 100-point math tests were 86, 92, and 89. what score does he need on his fourth math test to ensure an average score of at least 90?

a. x > 89

b. x > 93

c. x > 78

d. x > 90

idk the answer but just put a

step-by-step explanation:

correct answer is infinitely many solutions

step-by-step explanation:

2(2x + 3) = -4 + 2(2x + 5)

solving the above equation:

4x + 6 = -4 +4x +10

combining like terms

4x -4x = -4+10-6

0=0

since both sides are 0=0, we end up into true statement it means it has infinite many solutions.

so correct answer is infinitely many solutions

if x decreases by 4 then y increases by 10

step-by-step explanation:

your answer would be b

step-by-step explanation: