18 students scored 80%
22 students scored 70%
((18 × .8) + (22 × .7)) ÷ .4
(14.4 + 15.4) ÷ .4
(29.8) ÷ .4
74.5
The average score of the whole class was 74.5
Answer:
C
Step-by-step explanation:
To find the x- intercept let y = 0, hence
cos(
) = 0
=
(0 ) = ![\frac{\pi }{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cpi%20%7D%7B2%7D)
multiply both sides by 2
x = π ← x- intercept
Answer:
option A
Step-by-step explanation:
<span>The car will stop in 140.625 ft
</span>
Hey there!
The answer is C.
![\large\boxed{(18+27-2+14-16)\div5}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B%2818%2B27-2%2B14-16%29%5Cdiv5%7D)
To calculate the mean, you add all the values together then divide by the amount of values you have.
Since we are adding 5 numbers together, we divide it by 5.
Don't let the subtraction signs confuse you, it just means that some of the numbers are negative.
Hope this helps!