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Alexandra [31]
3 years ago
5

Evaluate 4 + (m - n) When m = 7 and n = 5.

Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
7 0

Answer:

7 - 5 = 2

2 + 4 = 6

Evaluate parenthesis first.

Add 4 to the number you got from subtracting 7 and 5.

ziro4ka [17]3 years ago
4 0
1. substitute:
4+(7-5)
2. simplify:
4+2
3. evaluate:
6
the answer is 6.

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what is the perimeter of the triangle. i do not know how to start this problem. any help will be greatly appreciated :))
xz_007 [3.2K]

Given:

Point F,G,H are midpoints of the sides of the triangle CDE.

FG=9,GH=7,CD=24

To find:

The perimeter of the triangle CDE.

Solution:

According to the triangle mid-segment theorem, the length of the mid-segment of a triangle is always half of the base of the triangle.

FG is mid-segment and DE is base. So, by using triangle mid-segment theorem, we get

\dfrac{1}{2}DE=FG

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DE=18

GH is mid-segment and CE is base. So, by using triangle mid-segment theorem, we get

\dfrac{1}{2}CE=GH

CE=2(GH)

CE=2(7)

CE=14

Now, the perimeter of the triangle CDE is:

Perimeter=CD+DE+CE

Perimeter=24+18+14

Perimeter=56

Therefore, the perimeter of the triangle CDE is 56 units.

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Answer:

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Step-by-step explanation:

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