Answer: 1/2
Step-by-step explanation:
30x + 18 = 35-4x
collecting like terms
30x + 4x = 35-18
34x = 17
divide both sides by 34
34x/34 = 17/34
x = 1/2
First dstribute the -5
-8p-5+5p=0
Add like terms
-3p-5=0, add 5 on both sides
-3p=5, divide -3 on both sides
p=-5/3
Answer:
7.5kilometer
Step-by-step explanation:
for 30mins semin runs 5kilometer
then for 1min: (1min×5kilometer)÷30mins,
therefore, for 45mins: (45mins×5kilometer)÷30mins=7.5kilometer
Answer:
the standard deviation of the speeds of cars travelling on California freeways is 6.0 miles per hour
Step-by-step explanation:
The computation of the standard deviation of the speeds of cars is shown below;
The z score for the top 1% is 2.326
So,
= (75 - 61) ÷ standard deviation = 2.326
Standard deviation is
= 14 ÷ 2.326
= 6.0 miles per hour
Hence, the standard deviation of the speeds of cars travelling on California freeways is 6.0 miles per hour
It's B!------------------------------