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gulaghasi [49]
3 years ago
12

Write an equation that can be used to find the degree measure of angle b Don’t put links !

Mathematics
2 answers:
dedylja [7]3 years ago
7 0

Answer:

Because they are supplementary angles, their sum is 180°.

∠b = 180° - 81°

∠b = 99°

Leona [35]3 years ago
5 0

Answer:

180-81=b

Step-by-step explanation:

Supplementary angles are angles that add up to 180. Normally, they are supplementary because they lie adjacent to one another on a line.

In this base, b is supplementary to 81! Meaning, to find b we can simply subtract 81 from 180.

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Solve the system of equations using the substitution method.
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First name these 2 equations with 1 and 2.
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Since y is already isolated in (2), so we can skip the isolation step and continue to substitute.

Substitute (2) into (1).
4x + 5(3x+9) = 7

Expand.
4x + 15x + 45 = 7

Group.
19x + 45 = 7

Shift +45 to the other side and turn it into -45.

19x = 7 - 45
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Shift x19 to the other side, turn it into /19.
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Now we solved x already, we can just substitute x= - 2 back to equation (2).

y = 3(-2) + 9
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So, the answers are
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3 0
3 years ago
What is the solution to the system of equations? (You can either do the substitution or elimination method) x - 2y = 19 x + 3y =
masha68 [24]

Answer:

D. (17,-1)

Step-by-step explanation:

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Add the equations together:

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Plug in y = -1 into an equation:

→ x + 3(-1) = 14

→ x - 3 = 14

→ x = 17

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Hope this helps!

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