The function w(x) = 60x represents the number of words w(x) you can type in x minutes, how many words can you type in 9 minutes
2 answers:
Answer:540 words
Step-by-step explanation:
Given : The function represents the number of words w(x) you can type in x minutes.
Then to find the number of words typed in 9 minutes , we need to pit x= 9 in the function .
The number of words can be typed in 9 minutes :
Hence, we can type 540 words in 9 minutes .
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Answer:
D
Step-by-step explanation:
The equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
Here (h, k) = (8, - 1), thus
y = a(x - 8)² - 1
To find a substitute (0, - 17), the coordinates of the y- intercept into the equation.
- 17 = a(0 - 8)² - 1
- 17 = 64a - 1 ( add 1 to both sides )
- 16 = 64a ( divide both sides by 64 )
a = = -
y = - (x - 8)² - 1 → D