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:
The earth is bigger
Step-by-step explanation:
The Earth is bigger than the sun, because 1 million earths can fit inside the sun.
1 Expand.
8x-6-8=4+2x8x−6−8=4+2x
2 Simplify 8x-6-88x−6−8 to 8x-148x−14.
8x-14=4+2x8x−14=4+2x
3 Add 1414 to both sides.
8x=4+2x+148x=4+2x+14
4 Simplify 4+2x+144+2x+14 to 2x+182x+18.
8x=2x+188x=2x+18
5 Subtract 2x2x from both sides.
8x-2x=188x−2x=18
6 Simplify 8x-2x8x−2x to 6x6x.
6x=186x=18
7 Divide both sides by 66.
x=\frac{18}{6}x=
6
18
8 Simplify \frac{18}{6}
6
18
to 33.
x=3x=3
Done Hope this helps let me know if u have any questions thank you
Answer:
<u>The answer is 692.</u>
Step-by-step explanation:
Number of cars with automatic transmissions = 356
Number of cars with power steering = 240
Number of cars with both of these options = 96
Number of cars that were manufactured with at least one of the two options = x
x = Number of cars with automatic transmission + Number of card with power steering + Number of cars with both of these options
x = 356 + 240 + 96
<u>x = 692</u>
<u>The number of cars manufactured with at least one of the two options is 692.</u>
