Answer:
3.50x+6.50=y
Step-by-step explanation:
Step-by-step explanation:
-74+36.2=-37.8
I hope it will help you
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:
7/2
Step-by-step explanation:
Answer:
36 
Step-by-step explanation:
<u>(5</u>
<u> x 3)</u> + (10 ÷
)
(16
) + <u>(10 ÷ </u>
<u>)</u>
<u>(16</u>
<u>) + (20)</u>
36 