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serious [3.7K]
3 years ago
11

Look at the following math problems. 10 + 2 = 12 12 − 2 = 10 What are these operations called?

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

Answer:

i think it might be fact families

Step-by-step explanation:

this is because they use the 3 same #rrs

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ivan used 5 yards of green for each quilt and 4 yards of blue for each quilt.

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mr. Hightower recorded the amount of each project that had been completed at the end of the week. the line plot describes the in
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[50 pts] An even number, n, times the next consecutive number, n + 2, is equal to 168. Find the original number.
ale4655 [162]

<u>We are given:</u>

An even number 'n', multiplied by the next consecutive even number is 168

<u>Solving for n:</u>

From the given statement, we can say that:

n(n+2) = 168                      [<em>n multiplied by the next even number 'n+2'</em>]

n² + 2n = 168

n² + 2n - 168 = 0               [<em>subtracting 168 from both sides</em>]

We can see that we now have a quadratic equation, solving using splitting the middle term

n² + 14n - 12n - 168 = 0

n(n + 14) -12(n + 14) = 0      <em>[factoring out common terms</em>]

(n-12)(n+14) = 0

Here, we can divide both sides by either (n-12) OR (n+14)

Checking the result in both the cases:

(n + 14) = 0/(n-12)                     (n-12) = 0/(n+14)

n + 14 = 0                                 n - 12 = 0

n = -14                                      n = 12

Both these values are even and since we are not told if the number 'n' is positive or negative, both 12 and -14 are the possible values of n

4 0
3 years ago
Divide. 3.2 ÷ 0.8 help me e pleaseeeeeeeeeeee !!!!!!
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\frac{3.2}{0.8} = \frac{32}{8} = \frac{4\times 8}{8} = 4
4 0
3 years ago
Read 2 more answers
How can you find the area of a polygon that is not for which you know an area formula
kipiarov [429]

Answer:

See below.

Step-by-step explanation:

If it is a regular polygon then you can look up the formula or break it into shapes you do know the formula.

If it is irregular or a composite figure, break it into regular polygons which do have formulas to find the area. Here is an example:

Example:

Find the area of the composite figure by splitting the figure into two shapes - two rectangles.

One rectangle is 2 x 9 = 18.

The other rectangle is 2 x 4 = 8.

Together the area is 18 + 8 = 26.

6 0
3 years ago
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