Use substitution to solve the following system of equations.-3x - 4y = 2−3x−4y=2minus, 3, x, minus, 4, y, equals, 2-5 = 5x + 5y−5=5x+5y

The solution to this system is (-2,1)

Step-by-step explanation:

The given system of equations is;

...eqn1

and

....eqn2

We make y the subject of the second equation to get:

...eqn3

We put eqn3 into eqn1 to get;

We expand to get:

Simplify both sides to get:

Put x=-2 into eqn3

The solution to this system is therefore (-2,1)

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet