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pantera1 [17]
3 years ago
12

(+4) + (-13) = solve.

Mathematics
1 answer:
Alex73 [517]3 years ago
4 0

Answer: -9

Step-by-step explanation: When your adding and subtracting positives and negatives, it's a good idea to use a number line to visualize what's going on.

When you're simplifying a problem like (+4) + (-13) we start at zero and +4 moves us 4 units to the right along our number line.

From there, -13 then moves us 13 units back to the left so we end up at -9.

Image provided.

Therefore, (+1) + (-13) = -9

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Lou's Diner spent $12.80 on 8 pounds
ki77a [65]

Answer:

1lb. = $1.60

7lb. = $11.20

Step-by-step explanation:

$<u>1</u><u>2</u><u>.</u><u>8</u><u>0</u> = <u>x</u>

8 1

cross multiply

8x= $12.80

divide $12.80÷8x

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8 0
4 years ago
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3 years ago
Last year the depth of the river was 4.2 feet deep. This year it dropped 25%. Find the depth of the river this year to cross it.
Novosadov [1.4K]

Answer:

The river is 3.15 feet deep.

Step-by-step explanation:

First let's recognize what we need to find: the depth of the river

We know last year the river was 4.2 feet deep, but it dropped 25%. This means we also need to find how much it dropped. To find this, we need to know what 25% of 4.2 is. Write an equation for this.

y = 25% of 4.2

y = 0.25 • 4.2

y = 1.05

This means that the river dropped 1.05 feet. To know its depth now, we need to subtract 1.05 from 4.2. Write an equation for this.

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The river is 3.15 feet deep.

Hope this helps!

4 0
3 years ago
Jerry started doing sit-ups every day. The first day he did 18 sit-ups. Every day after that he did 4 more sit-ups than he had d
USPshnik [31]

Answer:

18 + (4*5) = 38


because 4 * 5 is 20 then 20 + 18 is 38, and that's your answer.



have a nice day!   :)


7 0
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If each garden takes 20 minutes to clean, it will take him (20 x 4) to clean the gardens.

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80 minutes

or 1 hour and 10 minutes.

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3 years ago
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