To solve this you have to use cross multiplication.
This gives you 3(x-5)=2(x+2)
3x-15=2x+4
x-15=4
x=19
The correct answer would be 60 meters
4x² - 100 = 0
<u> + 100 + 100</u>
<u> 4x²</u> = <u>100</u>
4 4
x² = 25
x = <u>+</u>5
4(5)² - 100 = 0
4(25) - 100 = 0
100 - 100 = 0
0 = 0
4(-5)² - 100 = 0
4(25) - 100 = 0
100 - 100 = 0
0 = 0
The roots of the equation is positive or negative 5.
The answer to the problem is -5
The answer is a) 12m^3 + 10n^2