7x+2y=57x+2y=5 how do you do it

The value of .

Solution:

Given equations:

7x + 2y = 57 ---------- (1)

x + 2y = 5 ---------- (2)

Subtract 2y from both sides of the equation (2).

x = 5 – 2y ---------- (3)

Substitute equation (3) in equation (1).

7(5 – 2y) + 2y = 57

35 – 14y + 2y = 57

35 – 12y = 57

Subtract 35 from both sides of the equation.

–12y = 22

Divide by 12 on both sides.

Substitute y value in equation (3).

Hence the value of .

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

include a picture of the drawing in order for me to

step-by-step explanation: