What is the measure of angle 7? The measure of angle 1 is (3x + 10) and the measure of angle 4 is (4x -
15)
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∠7 = 95°

Step-by-step explanation:

∠1 and ∠4 are vertical angles so they are equal.

so:

3x + 10 = 4x - 15

simplify:

x = 25°

∠4 = 4(25) - 15 = 85°

∠8 = ∠4 because they are corresponding angles

∠7 = 180° - 85° = 95° because they are supplementary angles (add together to = 180°)

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step-by-step explanation:

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