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kotegsom [21]
3 years ago
14

5×12÷[-12÷{15+(4-13)}]​

Mathematics
1 answer:
Elina [12.6K]3 years ago
8 0

Answer:

=5×12÷[-12÷{15+(-9)}]

=5×12÷[-12÷6]

=5×12÷(-2)

=-30

Step-by-step explanation:

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Tara walks 2 miles in 30 minutes At this rate,how far can Tara walk in 45 minutes?​
nevsk [136]

Answer:

Step-by-step explanation:

In 30 minutes she can walk 2 miles. We'll put that as a ratio. 30:2. Now to figure out how much she walks in 45 minutes, we set variable to x and make it stand for how much she walks. We have 30:2 = 45:x We cross multiply to get 30x=90, x=3. Tara can walk 3 miles in 45 minutes.

5 0
3 years ago
HELP PLEASE BEST ANSWER WILL BE MARK AS BRAINLIEST!!
Evgesh-ka [11]
First of all,
The total weight of the six dogs are:
71+34+15+23+18+56=217 pounds
Then, we know that the average weight of the seven dogs are 40 pounds, so the total weights of the seven dogs are:
40×7=280 pounds.
Lastly, we know that the six dogs weights are 217 pounds and the total weight of the seven dogs are 280 dogs, so the seventh weight of the dog is:
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3 years ago
Please help me! I can’t find the perimeter of this shape
I am Lyosha [343]

Answer:

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3 years ago
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I really need help .<br><br> Which line is a linear model for the data?
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2 years ago
Drag the tiles to the correct boxes to complete the pairs. simplify the mathematical expressions to determine the product or quo
Sholpan [36]

The simplified mathematical expressions with the first factor to the nearest tenth are:

7.8 x 10

3.3 x 10^{3}

2.1 x 10^{-3}

3.7

<h3>What are the simplified mathematical expressions ?</h3>

Scientific notation is used to simplify large numbers in smaller numbers.  In order to write a number in scientific notation , the number is written as a decimal number, between 1 and 10 and multiplied by a power of 10.

(8.6 x 10^{7}) . (9.1 x 10^{-8})

= (8.6 x 9.1) x 10^{7 - 8}

= 78.26 x10^{-1}

= 7.8 x 10

(6.9 x 10^{5}) . (4.8 x 10^{-3})

= 33.12 x 10^{5 - 3}

3.3 x 10^{3}

(3.7 x 10^{2}) . (4.6 x 10^{-3}) ÷ (1.4 x 10^{-6}) . (5.7 x 10^{8})

= 1.7 x 10 ÷ 8 x10²

0.21 x 10^{-2}

2.1 x 10^{-3}

(3.1 x 10^{5}) . (5.3 x 10^{-9}) ÷ (7.3 x 10^{2}) . (6.1 x 10^{-7}) = 3.7

To learn more about scientific notation, please check: brainly.com/question/25334755

#SPJ4

8 0
2 years ago
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