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
Answer:
11,340
Step-by-step explanation:
5% = 420 420 x 7 = 2940
2940 + 8400 = 11,340
I’m pretty sure it will be the last one f(x)=(3x+1)(2x-5).
Answer:
2,3
Step-by-step explanation:
