M= -4/3
y=mx+b
y=(-4/3)x+b
5=(-4/3)*3 +b
b= 9
y=(-4/3)x+9
Answer:
(j - 7)(j - 6)
Step-by-step explanation:

i would say you need to divide 45 and 3. then subtract 45 and 15. then with those two numbers you need to put the amount from 45 / 3 on the top and the 15-45 on the bottom. you will get the probability.
i think don't quote me
Answer:
a = 60
2a = 120
Step-by-step explanation:
<u>360 = 2a + 2a + a + a </u>
360 = 6a
a = 360 / 6
a = 60
2a = 2(60)
2a = 120
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