The average of 4, 9, 16, 25 and x is 2x means that;
(4+9+16+25+x)/5=2x
Multiply both side by 5
5(54+x)/5=2x(5)
54+x=10x
Subtract x to both side
54+x-x=10x-x
54=9x
Divided 9 to both side
54/9=9x/9
x=6
Check:
Substitute x with 6
(4+9+16+25+x)/5=2x
(4+9+16+25+6)/5=2(6)
60/5=12
12=12; so x=6 which marks B as the correct answer. Have a nice day!
Answer:
d
Step-by-step explanation:
Answer: It will take Josh 4 minutes to get to school.
Step-by-step explanation:
- Divide the distance by the time.
- So, 10 minutes/ 5 miles
- Solve: 10/5= 2
- Their speed is 2 minutes per mile.
- Multiply 2 miles by 2 minutes
- The answer is 4 minutes
- It takes 4 minutes to get from Josh's house to the school.
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