You have to set these up in proportions to solve these problems. Then cross multiply and divide.
1. 3 = 15
12 = x
3x = 15 * 12
3x = 180
x = 180 ÷ 3
x = 60
Answer: 12 miles in 60 minutes (B)
2. 366 = 6
427 = x
366x = 427 * 6
366x = 2562
x = 2562 ÷ 366
x = 7
Answer: 427 miles in 7 hours (C)
Answer:
Step-by-step explanation:
Point Slope is:
We are given the point (-2, 5) and a slope of 1/2.
Hope this helps.
750 I believe multiply the digits all together
First we find the mean (average)
(17 + 18 + 19 + 20 + 21) / 5 = 95/5 = 19
now subtract 19 from all values...then square it
17 - 19 = -2...-2^2 = 4
18 - 19 = -1...-1^2 = 1
19 - 19 = 0...0^2 = 0
20 - 19 = 1....1^2 = 1
21 - 19 = 2...2^2 = 4
now take the mean (average) of those
(4 + 1 + 0 + 1 + 4) / 5 = 10/5 = 2 <== this is ur variance
standard deviation is the square root of the variance...
sq rt 2 = 1.414
A- 325 b- 382.8 C- 196 D- 9.375 E- 54 F- 828