1) 1/5x + 3=0
1/5x=-3
x=(-3)(5)=-15
2)6x-7=0
6x=7
x=7/6=1.17
3) -8/3x+9=0
-8/3x=-9
-8x=-27
x=27/8=3.375
Answer:
Step-by-step explanation:
if you divide 126 by 5, you get Meteorite B, 25.2, then minus that from 132, and you get Meteorite A, 106.8
To check, do 25.2 x 5 and you should get 132.
First, you calculate the total amount of parts : 2 + 5 = 7
Next, divide the number by the total amount of parts : 28 ÷ 7 = 4
After that, you multiply the answer by the amount of parts needed on both sides of the ratio : 4 × 2 = 8 and 4 × 5 = 20
Finally put these answers back into the ratio : 8:20
So there are 8 students in the play
To check, make sure both sides of the ratio add up to the original number : 8 + 20 = 28
The equation for this is (n-2) x 180
Replace n with the number of sides:
a. 9: (9-2) x 180 = 7 x 180 = 1,260
b. 19: (19-2) x 180 = 17 x 180 = 3,060
