Answer:
28
Step-by-step explanation:
2x + 7 = 4x - 7
14 = 2x
x = 7
BC = 4x = 4(7) = 28
test 1 = 50
test 2 = 70
70+50 = 120
so tests are .5*120/2 = 30 points
hw = .25*100= 25 points
quiz = .25*75 = 18.75
total score = 30+25+18.75 = 73.75
Answer:
361
Step-by-step explanation:
hope it helps you dude!!..........................
Answer:
a. x = 1 b. 36 c. 36
Step-by-step explanation:
a. At the equilibrium point, D(x) = S(x)
(x - 7)² = x² + 4x + 31
Expanding, we ave
x² - 14x + 49 = x² + 4x + 31
collecting like terms
14x + 4x = 49 - 31
18x = 18
x = 18/18 = 1
b. Substituting x = 1 into D(x), we have
D(1) = (1 - 7)² = (-6)² = 36
c. Substituting x = 1 into S(x), we have
S(1) = 1² + 4(1) + 31 = 1 + 4 + 31 = 36
Answer:
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