Answer:
40 problems in 100 minutes
Step-by-step explanation:
This is a ratio problem.
You first divide 30 minutes by three to get how many problems she can do in 10 minutes. What you do to one side you do to the other side. So then, you should have 4 problems in 10 minute. Then, you multiply 10 by 10 and 4 by 10 to get 40 problems in 100 minutes.
Answer B.
∑fx=1637,∑fx
2
=127663,∑f=21
x
ˉ
=Mean=
∑t
∑fx
=77.95
σ
2
=
∑f
∑fx
2
−(
x
ˉ
)
2
=
21
127663
−(77.95)
2
=2.987
σ=1.728
Answer: $33
Step-by-step explanation: Divide 27/9 which is $3
-so you pay $3 for each pack
-then to find how much you need to pay for 11 packs you just multiply 11*3=33
Answer:
x=10 x=5
Step-by-step explanation:
absalute value is the numarical distance away from 0
Answer:
-2x
Step-by-step explanation:
four X's minus 6 X's leaves the absence of 2 X's
x x x x
- x x x x x x
_________
- x x
