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Dimas [21]
3 years ago
9

I need help !!!!!!!!!!!!!

Mathematics
1 answer:
hoa [83]3 years ago
8 0

Answer:

see below

Step-by-step explanation:

7 x 13    (split 13 into 10 + 3)

= 7 x ( 10 + 3)     (expand parentheses by distributive property)

= (7 x 10) + (7 x 3)

= 70 + 21

= 91

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What is the estimate of -4.2 - (-2.9). Show your work
irakobra [83]

Answer:

-1

Step-by-step explanation:

-4.2-(-2.9)

-4.2➡ is about -4

-2.9➡is about -3

-4-(-3)

-4+3

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5 0
3 years ago
A = 100(1+r)^4<br> Expand the right of this formula.<br> appreciate your help with an explanation
suter [353]

Answer:

100r^4 + 400r^3 + 600r^2 + 400r + 100

Step-by-step explanation:

Expanding ( r + 1 )^4 gives :-

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So multiplying 100 with r^4 + 4r^3 + 6r^2 + 4r + 1 gives :-

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4 0
3 years ago
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maw [93]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
a veterinarian needs to know animals weight in kilograms. if 20 pounds is about 9 kilograms and a dog weights 30 pounds, use a r
ahrayia [7]

For this case we have the following conversion:

20 pounds = 9 kilograms

To use the table what we must do is find another relationship that allows us to find the weight in kilograms for 30 pounds.

For example, half the weight in pounds is half the weight in kilograms.

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So, for 30 pounds, we multiply this last ratio obtained by three on both sides:

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<em>substitute </em>

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6 0
3 years ago
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