Okay the answer is 69 because 81-2 is 69
Answer:
A
Step-by-step explanation:
hope this helps please brainiest
Answer:
vertex = (- 10, - 10 )
Step-by-step explanation:
The equation of a quadratic in vertex form is
y = a(x - h)² + k
where (h, k ) are the coordinates of the vertex and a is a multiplier
To obtain this form use the method of completing the square.
Given
h(x) = x² + 20x + 90
add/subtract ( half the coefficient of the x- term )²
h(x) = x² + 2(10)x + 100 - 100 + 90
= (x + 10)² - 10 ← in vertex form
with (h, k ) = (- 10, - 10 )
Answer:
at t=0 the car has moved 0 feet, also you know it has a constant speed so you get the points:
P1:(0,0) therefore you know b, the y-intercept=0
P2:(8,840)
insert P2 into y=mx+b
840=8m+0
840/8=m
105=m
so the result is:
y=105x=105t=f(t)=d
Step-by-step explanation:
Answer:
56
Step-by-step explanation:
The mean is the average number of a data set.
To find the mean:
First, add all the numbers in the data set:
30 + 45 + 45 + 70 + 90 = 280
Next, divide the sum (280) by 5 (amount of values):
280 / 5 = 56
56 represents the mean of your data set.
