Solve the following system of equations using substitution. what is the value of y?
2x+3y=105 x+2y=65 a. 15 b. 25 c. 40*** d. 65

y is 25

Step-by-step explanation:

Solve for x first.

x = 15 because  

2(15)+3(25)=105

and

15+2(25)=65

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

1. perpendicular

2. parallel

3. perpendicular