Match the reasons with the statements in the proof. Given:
c | | d, m4 = m5

Prove:
m7 = m8

1.c||d, m∠4=m∠5
2.m∠4 = m∠7
3.m∠5 = m∠8
4.m∠7 = m∠8
vertical angles are equal
given
If lines ||, alternate interior angles are equal.
substitution

77

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

two? xd

step-by-step explanation: