Answer:
Grace jumped for 9 minutes and Zoe jumped for 12 minutes
Step-by-step explanation:
Let Grace jumped for x minutes and Zoe jumped for y minutes
Grace jump no. of times in 1 minute = 66
Grace jump no. of times in x minutes = 66x
Zoe jump no. of times in 1 minute = 56
Zoe jump no. of times in x minutes = 56x
We are given that Their jumps today and together they jump 1266 times in the total of 21 minutes
So, x+y=21 ----1
66x+56y=1266 ---2
Substitute the value of x from 1 in 2
66(21-y)+56y=1266
y=12
x+y=21
x+12=21
x=21-12
x=9
Hence Grace jumped for 9 minutes and Zoe jumped for 12 minutes
The numbers will change and they can be increased or decreased
Answer:
Step-by-step explanation:
number of members=22
mean age=19 years
Total age of 22 members=22×19=418 years
age of new members=17 years and 30 years
Total age of 24 members=418+17+30=465 years
mean=465÷24=19.375 years
Answer: Angle CDG, I think.
Step-by-step explanation:
The definition of Corresponding Angle is: On the same side of the transversal. One is interior and the other is exterior.
Since ADE is interior, then the other angle must be exterior.