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777dan777 [17]
3 years ago
12

Which expression can be used to model the phrase “ the sum of three and a number”?

Mathematics
2 answers:
olga nikolaevna [1]3 years ago
5 0

Answer:

x + 3

Step-by-step explanation:

A 'sum' means addition, 'a number' is represented by a variable, in this case, I chose 'x'.  I could have picked any variable I wanted.

The sum of three and a number means:  three plus some number, which is

 3 + x       in math language.     We write variables before constants, so it gets

                  rewritten as x + 3

Oliga [24]3 years ago
5 0

Answer:

A) 3 + x

Step-by-step explanation:

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The answer is negative, because the first number is negative.

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The formula for perimeter of a rectangle is given by p = 2l + 2w, where p = perimeter, l = length, and w = width. solve the form
TiliK225 [7]
Perimeter formula
p = 2l + 2w

I reverse left-right side
2l + 2w = p

Move 2l to the right
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Move 2 to the right
2w = p - 2l
w = (p - 2l)/2

Summary
p = 2l + 2w
2l + 2w = p
2w = p - 2l
w = (p-2l)/2
5 0
3 years ago
1 question. A big square is made up of 4 identical small squares the area of each small square is 25 cm A. Find the length of ea
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Answer:

50cm

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Step-by-step explanation:

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15 +2

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8 + 2

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17 * 10 = 170

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5 0
2 years ago
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gizmo_the_mogwai [7]

Answer:

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Step-by-step explanation:

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3 years ago
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Rudik [331]

Answer:

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Step-by-step explanation:

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