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2 years ago

What is proportional reasoning and how does it help you solve percent equations?

Mathematics

1 answer:

nata0808 [166]2 years ago

6 0

Answer:

We can't set up a proportion to solve for x in a percent equation. For example, 34/100=5/x

Step-by-step explanation:

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How do I solve this?

mart [117]

X + y = 20 Substitute
x by 2 y - 4 in x + y = 20 to obtain 2 y •
4 + y = 20 Solve for y to find y = 8 and
x = 2y - 4 = 12

3 0

1 year ago

Read 2 more answers

Been trying to get this one answered for months, will make the first one to answer a brainliest :D Please explain how you did it

Nikitich [7]

Answer:

$\frac{2}{7}$

Step-by-step explanation:

In order to find the slope of a line you must find where the points intersect, use the formula for slope, substitute values, and simplify if needed.

In this case we were already given the points for slope:

$P1=(-4,-4) = (x1,y1)$

$P2=(-2,3)=(x2,y2)$

Slope formula:

$slope = \frac{y2-y1}{x2-x1}$

Now substitute:

$\frac{-2--4}{3--4}$

Solve using KCC: (Keep, Change, Change)

$-2+4=2$

$3+4=7$

= $\frac{2}{7}$

Because the slope isn't a negative you do not need to simplify the answer.

Hope this helps.

8 0

2 years ago

During summer vacation, Erin read, on average, 4 pages per night. Once she returned to school, she averaged 3 pages per night. W

alexandr1967 [171]

Answer:

25% decrease.

Step-by-step explanation:

3/4=75%

100%-75%=25% decrease.

6 0

2 years ago

I need help with this plzzzzzzzzzzzz

Sunny_sXe [5.5K]

Answer:

6ft by 15ft

Step-by-step explanation:

just divide each number by two and add it to the origanal number.

7 0

2 years ago

(need done quickly)

djyliett [7]

The error is that he probably forgot the decimal point thus causing him to say '"hundred" instead of "and" for the decimal point.

3 0

3 years ago