Answer:11
Step-by-step explanation:
Boys : girls=7:1
Sum of ratio=7+1=8
Let them number of girls be y
Then they number of boys=y+66
Total number of pupils=y+y+66
Total number of pupils=2y+66
Number of girls=(girls ratio)/(sum of ratio) x (total number of pupils)
y=1/8 x (2y+66)
Cross multiply
y x 8=2y + 66
8y=2y + 66
Collect like terms
8y-2y=66
6y=66
Divide both sides by 6
6y/6=66/6
y=11
The number of girls is 11
I’m not sure never took that test
Answer:
I have to go get my car from the doctor office today
Answer:
b = 6
Step-by-step explanation:
18 = 3b
3b = 18
b = 18/3
<em><u>b = 6 </u></em>
Answer:
The axis of symmetry is x=1
