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

triangle abc is reflected on the line x=-6.5 then reflected again on the x axis

step-by-step explanation:

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.