Answer:
A. x=3, y= -6
Step-by-step explanation:
x - 2y = 15
2x + 4y= -18
<em>Solving for x</em>
x-2y=15
<em>Subtract x from both sides</em>
-2y= -x+15
<em>Multiply both sides by -1</em>
2y=x-15
<em>Multiply both sides by 2</em>
4y=2x-30
2x+4y= -18
<em>Subtract 2x from both sides</em>
4y= -2x-18
<u>Combine equations:</u>
-2x-18=2x-30
<em>Add 2x to both sides</em>
-18=4x-30
<em>Add 30 to both sides</em>
12=4x
4x=12
<em>Divide both sides by 4</em>
x=3
Solving for y
x-2y=15
<em>Add 2y to both sides</em>
x=2y+15
<em>Multiply both sides by 2</em>
2x=4y+30
2x + 4y= -18
<em>Subtract 4y from both sides</em>
2x= -4y-18
<u>Combine equations:</u>
-4y-18=4y+30
<em>Add 4y to both sides</em>
-18=8y+30
<em>Subtract 30 from both sides</em>
8y= -48
<em>Divide both sides by 8</em>
y= -6
Answer:
It is 102
Step-by-step explanation:
Answer is C.9(3r-4) and 27r-36
Step-by-step explanation:
The answer is $6.80.
The full price: $8.00 (100%)
The discount: 15%
The discounted price: x (100% - 15% = 85%)
Make a proportion.
$8.00 : 100% = x : 85%
x = $8.00 * 85% : 100% = $6.80
1. 62 and (4x+2) are alternating interior angles and they are equal
so
62 = 4x+2 now solve for x
2. vertical angles are straight across from each other
1 and 4
2 and 3
5 and 8
7 and 6
Alternate interior : alternate (or cross) the Transversal and are interior (inside) and are equal
4 and 5, 3 and 6
Corresponding are the angles in matching corners
1 and 5, 2 and 6, 3 and 7, 4 and 8
Alternate exterior : alternate (or cross) the Transversal and are exterior (outside)
2 and 7, 1 and 8,
