You can multiply or divide one equation so that it has a variable with a coefficient opposite of the other equation.
Example:
A) 2x + 3y = 6
B) 4x +2y = 20
Notice that neither equation has a "1" or "-1"
Let's multiply Equation A) by -2
A) -4x -6y = -12 Then add it to B)
B) 4x +2y = 20
-4y = 8
y= -2
A) 2x + 3*-2 = 6
2x = 12
x = 6
Answer:
<h2>
6.</h2>
Step-by-step explanation:
Answer and work are in picture below.
To convert a fraction to a percent you first, turn the fraction to a decimal, by dividing the numerator by the denominator. Then to convert it to a percent you multiply the decimal by 100, and to the product put a percentage sign,, and there is you r answer.
Example:-

3 ÷ 4 = 0.75
0.75 × 100 = 75%
So, 3/4 in percentage form is 75%.
Hope I helped ya!! xD
Answer:
0.99
Step-by-step explanation:
cos(arcsin(5/30)) = 0.98601 ≈ 0.99