Answer:
14 minutes
Step-by-step explanation:
Ⓗⓘ ⓣⓗⓔⓡⓔ
Well, what I do for these problems is do 1/x with x being the amount of time given.
1/21+1/42=3/42
3/42=1/14
Together, they would take 14 minutes!
(っ◔◡◔)っ ♥ Hope this helped! Have a great day! :) ♥
Answer:
2
Step-by-step explanation:
Value = 80
Mean = 70
Variance = 25
Standard deviation=root(Variance)=root(25)=5
z score = (value - mean)/standard deviation
= (80-70)/5
= 10/5
= 2
Answer:
68 cm
Step-by-step explanation:
√289 = 17
each side is 17 cm
17 * 4 = 68 cm
Answer:
w = -16
Step-by-step explanation:
w + (-2) = -18
Add 2 to each side
w-2+2 = -18+2
w = -16