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Zina [86]
2 years ago
12

In triangle DEF, if the measures of angles D and E are equal, and the measure of

Mathematics
1 answer:
emmasim [6.3K]2 years ago
6 0

Answer:

77 = m∠D  =  m∠E

Step-by-step explanation:

In a triangle the sum of the measures of the angles = 180.  So m∠D  + m∠E + m∠F = 180

Let  m∠D = m∠E = x

Then x + x + 26 = 180

2x + 26 = 180

2x = 154

x = 77 = m∠D  =  m∠E

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Solve for the unknown variable: -8m - 9 = 39
Lemur [1.5K]

Answer:

m =-6

Step-by-step explanation:

To solve for the unknown variable, m, we have to get m by itself. Perform the opposite of what is being done to the equation.

-8m-9=39

9 is being subtracted from-8m, so add 9 to both sides. Addition is the opposite of subtraction.

-8m-9+9=39+9

-8m=39+9

-8m=48

-8 and m are being multiplied. Divide both sides by -8, because division is the opposite of multiplication

-8m/-8=48/-8

m=48/-8

m= -6

6 0
3 years ago
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3 0
3 years ago
The length of a rectangle is 3 inches longer than its width. If the perimeter of the rectangle is 54 inches, find it’s length an
dangina [55]

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Step-by-step explanation:

L = length

W = width

L = W+ 3

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W = \frac{48}{4}

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now to find the length, plug the width into the equation L = W + 3

length:

L = W+3

L=12 +3

L = 15

6 0
3 years ago
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