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vampirchik [111]
3 years ago
10

Add or subtract mentally 16.9+ 12.1

Mathematics
2 answers:
saul85 [17]3 years ago
7 0
When you add it mentally you'd get 29
When you subtract it mentally you'd get 4.8
Ostrovityanka [42]3 years ago
6 0
Well, just add or subtract it form the back and work your way to the front, and you have to remember what the digit was.

16.9 + 12.1 = 29
16.9  - 12.1 = 4.8
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Equal.

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3 years ago
H + 169 = 759 solve for h
steposvetlana [31]

Answer:

h = 590

Step-by-step explanation:

To find x, rearrange the equation to where h is on its own side.

<u>Rearranged equation:</u>

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5 0
2 years ago
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3 0
3 years ago
Please answer quickly!!!
mixas84 [53]

Answer:

Step-by-step explanation:

5x + 13y = 232

12x + 7y = 218

For each choice:

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- 65x - 169y = - 3016

84x + 49y = 1526

Can not eliminate x and y.

b) The first equation can be multiplied by 7 and the second equation by 13 to eliminate y. So we have

35x  + 91 y = 1624

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Can not eliminate x and y if we ADD.

<em>(If we subtract, this is Yes)</em>

<em></em>

c) The first equation can be multiplied by –12 and the second equation by 5 to eliminate x.

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d) The first equation can be multiplied by 5 and the second equation by 12 to eliminate x.

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Can not eliminate x and y

The final answer is C

3 0
3 years ago
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