Answer:
<h3>There are 100 girls in the school</h3>
Step-by-step explanation:
Let the total number of people be x
To find the number of girls in the class we must first find the total number of people in the class
First find the total parts
That's
2 + 5 = 7
2/7 of the total number of people are boys
So we have
2/7 × x = 40
Multiply through by 7
2x = 280
Divide both sides by 2
x = 140
There are 140 people in the school
Finding the number of girls we have
5/7 × 140
= 100
There are 100 girls in the school
Hope this helps you
Answer:
28571/1000
Step-by-step explanation:
r/5 4/7
Cross Multiply to get
r7 and 20
divide both sides by 7
r = 2.8571
Since that is in the thousands place the answer is 28571/1000
Part A: 3x+6
Part B: 3(11)+6
Not a 100% sure but hope this helps
F(n+1)=-1/2f(n)
f(n)=-2f(n+1)
given f(1)=120
-2f(1+1)=120
f(2)=-60
f(2)=-2f(2+1)=-60
f(3)=30
f(3)=-2f(3+1)=30
f(4)=-15
f(4)=-2f(4+1)=-15
f(5)=15/2
Answer: The answer is $1.2
Step-by-step explanation:
You are trying to find the price of the whole mixture per pound. So first you multiply 3 and $1.7 and then multiply 5 and $0.90 then we divide the total cost by the number of pounds bought and you arrive at the answer $1.2.
Hope this was helpful.