Average speed:
(60+40)/2 = 50 mph
Answer:
4a. 15 wear braces
b. 20%
5a. 140 children - 400 - 120 = 280 ... 280/2=140
b. 35%
6a. Bob got $22.50. $45 / 2 = $22.50
b. $45 - $90 / 2 = $45
Step-by-step explanation:
pls mark brainliest! <3
The z-score for this temperature is 2.097. The probability that a temperature would be greater than or equal to this temperature is 0.0179, or 1.79%. This would be considered an unusual temperature.
ExplanationUsing a z-table (http://www.z-table.com) we find the probability that a score is less than this to be 0.9821. Thus the probability that a score is greater than or equal to this would be 1-0.9821=0.0179.
Answer:
Step-by-step explanation:
Answer:
y=4
Step-by-step explanation:
The question is asking what is the value of y:
Since all lengths have a dash on them they are all equal :
So 3y = y+8
3y = y + 8
First we subtract y from both sides:
3y-y = y+8-y
2y = 8
Divide both sides by 2:
2y÷2 = 8÷2
y = 4