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1. For the following system of equations, what is the xvalue of the solution?
–x + 2y = 6
6y = x + 18
(1 point)
–18
0
–6
3
2. The sum of the measures of angle X and angle Y is 90. If the measure of angle X is 30 less than twice the measure of angle Y, what is the measure of angle X? (1 point)
20°
35°
50°
65°
 one year ago
 one year ago
1. For the following system of equations, what is the xvalue of the solution? –x + 2y = 6 6y = x + 18 (1 point) –18 0 –6 3 2. The sum of the measures of angle X and angle Y is 90. If the measure of angle X is 30 less than twice the measure of angle Y, what is the measure of angle X? (1 point) 20° 35° 50° 65°
 one year ago
 one year ago

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jazyBest ResponseYou've already chosen the best response.1
1. Use substitution. Solve for y in the first equation. –x + 2y = 6 Add x. 2y = x + 6 Divide by 2. y = 1/2x + 3. Substitute y into the second equation. Solve for x. 6y = x + 18 6(1/2x + 3) = x + 18 Distribute. 3x + 18 = x + 18 Subtract x. 2x + 18 = 18 Subtract 18. 2x = 0 x = 0
 one year ago

jazyBest ResponseYou've already chosen the best response.1
2. The sum of the measures of angle X and angle Y is 90: x + y = 90 X is 30 less than twice the measure of angle Y: x = 2y  30 You have your two equations. Use substitution. Solve for y in the first equation. x + y = 90 Subtract x. y = x + 90 Substitute it into the second equation. x = 2y  30 x = 2(x + 90)  30 Distribute. x = 2x + 180  30 x = 2x + 150 Add 2x. 3x = 150 Divide by 3. x = 50
 one year ago
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