show your work: Solve using combination method 3x+y=4 2x+y=5

y=7

Step-by-step explanation:

Multiply each equation by the value that makes the coefficients of y opposite.

3x+y=4

(−1)⋅(2x+y)=(−1)(5)

Simplify.

3x+y=4

−2x−y=−5

Add the two equations together to eliminate y from the system.

     3x+y=4

+−2x−y=−5

     x  =   −1

Substitute the value found for x into one of the original equations, then solve for y

3(−1)+y=4

Multiply 3 by −1

−3+y=4

Move all terms not containing y to the right side of the equation.

Add 3 to both sides of the equation.

y=4+3

Add 4 and 3

y=7

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: