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DaniilM [7]
3 years ago
12

What is the measure of

Mathematics
1 answer:
rodikova [14]3 years ago
3 0

The 3 angles of a triangle need to equal 180 degrees.

Angle B is given as 15, so the sum of angle A and C need to equal 180 - 15 = 165 degrees.

Set up the equation:

(12x+12) + (3x+18) = 165

Combine like terms:

15x + 30 = 165

Subtract 30 from each side:

15x = 135

Divide both sides by 15:

x = 135 /15

x = 9

Now you know X, replace x in each equation and solve:

A = 12x + 12 = 12(9) + 12 = 108 +12 = 120

B = 3x+18 = 3(9) +18 = 27 +18 = 45

Angle A = 120

Angle B = 45

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10x+8=3(x-2) 10x+8=3x-6
d1i1m1o1n [39]

Answer:

x = -2

Step-by-step explanation:

10x+8=3x-6

subtract 10x-3x

7x+8= -6

subtract -6-8

7x=-14

divide 7 into -14

x = -2

Hope this helps!

4 0
3 years ago
The sum of 5 consecutive odd numbers is 145 what is the third number in this sequence ​
lawyer [7]

9514 1404 393

Answer:

  29

Step-by-step explanation:

The third in sequence will be the middle one, the average value of all the numbers in the sequence. That average is the sum (145) divided by the number of numbers (5).

  third number = 145/5 = 29

8 0
2 years ago
Can you help me please
VladimirAG [237]
Okay one moment i will have the answer soon...
3 0
3 years ago
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Write a proof that shows how 45 and 4.5 have a factor of 10. and are similar.
Sidana [21]

Answer: 4.5 x 10 = 45

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5 0
2 years ago
The box plots shown represent two data sets. Use the box plots to compare the data sets.
DiKsa [7]

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8 0
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