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3 years ago

Use a area model to find the product 28 time 32

Mathematics

1 answer:

kiruha [24]3 years ago

7 0

Answer: The answer is 896.

Step-by-step explanation: There are several ways to answer this. If you multiply both the 28 and the 32 you get the final answer 896 quickly.

However there are different ways to get the answer that aren't as quick as this one.

First we multiply.

30*20=600

Then we continue multiplying.

8*30=240

20*2=40

8*2=16

Then we add all the values up starting with the hundreds

600+240=840.

40+16=56

Finally we add both of the values up and we get our answer 840+56=896.

A=896 Hope this helps!

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Mrrafil [7]

Answer:

$\text{a. }x=7, x=-7, \\\text{b. }x=16, x=-16, \\\text{c. }x=3, x=-17, \\\text{d. }x=7, x=-7$

Step-by-step explanation:

For $|x|=y$ , we have two cases:

$\begin{cases}x=y, \\x=-y\end{cases}$

Using this, we can solve all four of the problems:

$\text{a. }|x|=7,\\\begin{cases}x=7, \\x=-7\end{cases}$

$\text{b. }|2x|=32,\\\begin{cases}x=16, \\x=-16\end{cases}$

$\text{c. }|x+7|=10,\\\begin{cases}x+7=10, x=\boxed{3,} \\x+7=-10, x=\boxed{-17}\end{cases}$

$\text{d. }5|x|=35,\\\begin{cases}x=7, \\x=-7\end{cases}$

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3 years ago

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Marta recorded the temperature at 8 p.m. as 56°F and the temperature at 8 a.m. the next morning as 36°F. Marta assumed the tempe

Ksju [112]

1. Calculate how many hours passed between her temperature checks. 8 p.m to 8 a.m. is 12 hours.

2. Calculate the total change in temperature. 36 - 54 is -18, so the temperature went down by 18 degrees.

3. We are looking for degrees per hour, so we put derees(18) over hours (12) to get 18/12.

4. Calculate by dividing. The answer is 1.5 degrees per hour.

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3 years ago

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PLEASE HELP! i have a couple minutes left

swat32

Answer:

1.8

Step-by-step explanation:

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3 years ago

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Dmitry [639]

Answer:

The area of the neighborhood in which they are advertising is 8.75 km²

Step-by-step explanation:

The coordinates of the street corners are;

(3, 15), (6, 4) and (11,9)

Therefore;

The distance between each street corner are found using the following formula;

$Distance, \ d=\sqrt{\left (y_{2}-y_{1} \right )^{2}+\left (x_{2}-x_{1} \right )^{2}}$

Substituting, using an online tool, we find the distances;

Between (3, 15) and (6, 4), d = √32.5 km

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The area is given by Heron's formula as follows;

$A = \sqrt{s\cdot \left (s-a \right )\cdot \left (s-b \right ) \cdot \left ( s-c \right )}$

Where;

s = (√32.5 + √12.5 + 5)/2

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Substituting (using an online tool) the values gives;

A = 8.75 km²

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