I first found x using the second equation :

-2x+4y=15
-2x = -4y+15
x =2y-7.5

Then, I substituted this value into the OTHER equation :

2x+5y=7
2(2y-7.5)+5y=7
4y-15+5y=7
9y=22
y=2.444

So you have you y value. Now, input this value into any one of the other equations (it doesn't matter which) to find x.

-2x+4y=15
-2x+4(2.444)=15
-2x+9.776=15
-2x=5.224
x=-2.612.

So the solution for this system of functions is (-2.612, 2.444).

7 0

3 years ago

Companies A and B each initially earn $18.00 per hour. If employee A receives a $1.50 per hour raise each year and Employee B re

tensa zangetsu [6.8K]

Employee B will make more money in the third year Because in year third his/her % is going to increase up to 12%.
To find out multiply 18.00 the initial amount times 12% = $2.16

4 0

3 years ago

A(n) _____ is a flat surface of a polyhedron in the shape of a polygon. edge vertex cross section face

77julia77 [94]

Face

hope this helps

3 0

3 years ago

Read 2 more answers

Concrete is made by mixing screenings, cement and sand in the ratio 3:1:15. How much sand would be needed to make 125 tonnes of

Montano1993 [528]

Step-by-step explanation:

it still remains 125 it doesn't change