Answer:
6) F
7) B
Step-by-step explanation:
6)
60= 2[½(n -6) +2n +5]
Expand:
60= 2(½)(n -6) +2(2n) +2(5)
60= n -6 +4n +10
Simplify:
60= 5n +4
Minus 4 on both sides:
5n= 60 -4
5n= 56
Divide both sides by 5:
n= 56 ÷5
n= 11.2
Thus, option F is correct.
7)
13q +2= 9(q +6)
Expand:
13q +2= 9q +54
Bring q terms to one side, constant to the other:
13q -9q= 54 -2
Simplify:
4q= 52
Divide both sides by 4:
q= 52 ÷4
q= 13
Thus, option B is correct.
Answer:
Step-by-step explanation:easy my×5y is 250
Answer:
B
Step-by-step explanation:
the mean is calculated as
mean =
this year's mean = = = 4.1
last year's mean = = = 3.1
difference = 4.1 - 3.1 = 1
The circumference of a circle is proportional to its diameter.
Now, when d=1, C=π, therefore:
k=π
This means that:
If C=15π:
15π=πd
Therefore:
d=15