missheather0309
30.07.2019 •
Mathematics
Which of the following is the correct standard form of y=3(x-8)(x-5)
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Ответ:
ax^2 + bx + c
So multiply/distribute everything
y = 3(x^2 - 5x - 8x + 40)
y = 3(x^2 - 13x + 40)
y = 3x^2 - 39x + 120
Ответ:
y = 10 when x = 9
Step-by-step explanation:
y = k/x
Where,
k = constant of proportionalty
Find k when x = 6 when y = 15
y = k/x
15 = k/6
Cross product
15 * 6 = k
k = 90
what does y equal when x = 9?
y = k/x
= 90/9
y = 10
y = 10 when x = 9