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(4,0) and (1,-3) are the solutions sets.

Step-by-step explanation:

Given that:

y = x²-4x       Eqn 1

y = x - 4        Eqn 2

In substitution method, the equation is solved for one variable and then put in the other.

Putting value of y from Eqn 2 in Eqn 1

x - 4 = x²- 4x

Adding -x+4 on both sides

Factorizing the equation;

Either,

x-4 = 0,     => x=4

Or,

x-1=0,       => x=1

Putting x=4 in Eqn 2

y = 4-4

y = 0

Putting x=1 in Eqn 2

y = 1-4

y = -3

Hence,

(4,0) and (1,-3) are the solutions sets.

answer: the answer is c.

step-by-step explanation:

she’s dividing 1/3 of the flour into 2 jars.

hope this : )

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