She made an error in the STEP 1
she shouldnt multiply the numbers
Answer:
7.
Step-by-step explanation:
Range = highest value - lowest
= 9 - 2
= 7.
Answer:
8
Step-by-step explanation:
x=average
(x+x+x+x)/4=average
to increase x by 2 you add 2
x+2=average
(x+2+x+2+x+2+x+2)=4=(4x+8)/4=x+2
you'd have to increase the sum by 8 to make the numbers' averages' go up by 2
Answer:
4
Step-by-step explanation:
twice her age:
10*2 = 20
24-20 = 4
