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Nana76 [90]
3 years ago
9

Suppose you cannot remember the answer to 15-8=7. What could you do to solve?

Mathematics
2 answers:
Sveta_85 [38]3 years ago
3 0

You can think in reverse. Addition is the opposite of subtraction. So to solve 15-8, you can ask "8 plus what number is equal to 15?" and note how 8+7 = 15. So that's why 15-8 = 7. Similarly, 15-7 = 8 can be solved the same way.

Delvig [45]3 years ago
3 0

Calculate either in your head or on a paper what plus 8 equals 15, you can solve it easily this way. It is probably easier to do in your head (9, 10, 11, ...), continue on and make sure to remember how much is the sum.

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6 becomes 13 (x)  /multiplied with about 2.167/
72 becomes 156(y) /multiplied with about 2.167/

8) Inversely proportional, so if I multiply the first with a number, then I have to divide the second with the same number.
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5 0
3 years ago
Pleaseeee helppppppppp meeeeee
Lera25 [3.4K]

Answer:

x = 10 yd

Explanation:

These triangles are based on proportions. 12 yd is proportional to 18 yd, and <em>x </em>yd to 15 yd. We want to find <em>x</em>. We'll use the rule of three to calculate the unknown number.

12/18 = x/15

x = (12 · 15)/18

x = 10 yd (10 yards from the hut to the gold coins)

3 0
3 years ago
What is the linear equation of 3x = 12 - 2y in standard form?
serious [3.7K]
Y=mx+b // standard form

3x=12-2y
2y=-3x+12
y=-3/2x+12/2
y=-3/2x+6

So the answer is: y = -3/2x+6
5 0
3 years ago
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For each problem, select the answer from the two choices.
Veseljchak [2.6K]

Answer:

  1. a. More than 20
  2. b. Less than 10
  3. b. Less than 0.2

Step-by-step explanation:

  1. 212.5
  2. 9.7
  3. 0.1608

Hope it helped you

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3 years ago
A googol is a large number that is the digit 1 followed by one hundred zeros. if you multiply a googol by 100, how many zeros wi
frutty [35]
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3 0
3 years ago
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