Answer:
5 × [5(-7)]
= 5 × (-35) ---- 5 × (-7) = -35
= -175
A. 1.50c+ 4.00a = 5050 (Money earned)
c + a =2200 (Guests in the museum)
Answer:
10
Step-by-step explanation:
Let c = sum of ages of all children.
mean age of all children = c/15 = 7
c = 15 * 7 = 105
The sum of the ages of all children is 105.
Let b = sum of ages of the 9 boys.
mean age of boys = b/9 = 5
b = 9 * 5 = 45
The sum of the ages of the boys is 45.
The sum of the ages of the girls is c - b.
c - b = 105 - 45 = 60
The number of girls is 15 - 9 = 6
mean age of girls = (sum of ages of the girls)/(number of girls) =
= 60/6 = 10
I think it’s 21:9 I don’t know but I think that would be the answer
