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alexira [117]
3 years ago
9

Find the value of the expression. 21 - -6

Mathematics
1 answer:
Licemer1 [7]3 years ago
3 0

Answer:

27

Step-by-step explanation:

Subtracting a negative is like adding

21 - -6

21 +6

27

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Solve x + 9 = 18 - 2x
bezimeni [28]
Add 2x to both sides,
3x+9=18
Subtract 9 from both sides. 3x=9
Divide both sides by 3. 
x=3
6 0
3 years ago
Rita purchased two loaves of wheat bread. Each loaf was $1.89. How much
Amanda [17]

Answer: 3.78

Step-by-step explanation:

Because she bought 2 $1.89 loaves, she spent 2 * 1.89, or 3.78 dollars.

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8 0
3 years ago
Read 2 more answers
|1/4 x +2| -3 =5 solve for x and graph on number line
kaheart [24]

The value of x on the number line is 24 and - 40

A number line in elementary mathematics is a representation of a graduated straight line that acts as an abstraction for real numbers, represented by the letter R. It is assumed that every point on a number line corresponds to a real number, and that every real number corresponds to a point.

When seen as a geometric space, namely the one-dimensional Euclidean space, the number line, also known as a real line in advanced mathematics, is technically defined as the set R of all real numbers. It can be conceptualized as a linear continuum, metric space, topological space, vector space (or affine space), measure space, or topological space.

The given equation is

|\frac{1}{4}x+2 | -3=5

Solving the equation:

or,|\frac{1}{4}x+2 | =5+3\\or,|\frac{1}{4}x+2 |=8\\or,\frac{1}{4}x+2=\pm8\\or,x+8=\pm32\\or,x=-8\pm32

Now we take the two separate values of x:

either x=-8+32 or x=-8-32

or,x=24 or x=-40

The value of x is 24 and - 40.

To learn more about number line:

brainly.com/question/24644930

#SPJ9

7 0
2 years ago
Help fast! What is the area ? To thiiiissss
lesya692 [45]
28(7) + 30(25) = 946 square inches

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7 0
3 years ago
Your friend asks you to help him with his snow shoveling business and will pay you 3 pennies for the first job. You agree to hel
ratelena [41]

Total = 3^x, where x is the number of jobs worked.

Let x = 7th job:

Total = 3^7 = 2187 pennies. = $21.87

8 0
3 years ago
Read 2 more answers
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