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STatiana [176]
3 years ago
5

How can you use proportions to solve percent problems?

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
4 0
Percents are out of 100, so saying 25% is the same as (25/100), which is a proportion!!
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Explain how place value could be used to find the difference of 4.23 and 2.75
seropon [69]
You can use place value to align the numbers together so you can subtract correctly. Match the ones, tenths, and hundredths digits together to subtract.

4.23
2.75

then you can subtract correctly without any mistakes in place value
6 0
3 years ago
It was recently estimated that females outnumber males by about three or two. If there are 1770 people in a county, how many of
max2010maxim [7]

GIVEN

1) Females outnumber males by 3 to 2.

2) There are 1770 people in the city.

SOLUTION

Let the number of males be x and the number of females y. Therefore, the total number of people can be written to be:

x+y=1770\text{   -----------(1)}

If there are 3 females for every 2 males, we have that:

\begin{gathered} \frac{y}{3}=\frac{x}{2} \\ \therefore \\ x=\frac{2y}{3}\text{   ----------(2)} \end{gathered}

We can substitute equation (2) into equation (1) and solve for y:

\begin{gathered} \frac{2}{3}y+y=1770 \\ \frac{2y+3y}{3}=1770 \\ 5y=1770\times3 \\ 5y=5310 \end{gathered}

Dividing both sides by 5, we have

y=1062

There are 1062 females in the county.

3 0
1 year ago
3. If the scale factor in a dilation is a number between 0 and
REY [17]

Answer: Reduction

Step-by-step explanation: If the scale factor of a dilation is between 0 and 1, the image will be smaller than the object, a reduction. It would only be an enlargement if the scale factor is greater than 1.

4 0
2 years ago
Using Heron's Formula, find the Area.<br> Sides are 7 13 8
Amanda [17]

Answer:

10.3

Step-by-step explanation:

hope this helps, if any genius answers as well, give brainliest to them

5 0
2 years ago
Read 2 more answers
Simplify fully<br> 2x power two + 9x + 10 ÷ 2x+5 <br> pls need answer quickly
Lunna [17]

Answer:

2x^2+14x+5

Step-by-step explanation:

x^2+9x+5x+5

Combine Like Terms:

=2x^2+9x+5x+5

=(2x^2)+(9x+5x)+(5)

=2x^2+14x+5

7 0
3 years ago
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