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kumpel [21]
3 years ago
12

A sweater, originally priced at $32, is on sale for $28. What is the percent of decrease rounded to the nearest whole number? OA

) 70% OB) 60% OC) 1490 OD) 13%
Mathematics
1 answer:
Tatiana [17]3 years ago
5 0
The answer would be 13%.
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A business rents bicycles and in-line skates. Bike rentals cost $25 a day and skates cost $20 a day. The business had 20 rentals
Lena [83]
25x+20y=455
x+y=20


20x+20y=400
-25x-20y=-455
-5x=-55
x=11
11+y=20
y=9

Solved it as well, sorry if I wasn't supposed to

6 0
3 years ago
Last math question.
siniylev [52]

Answer:

<h2>y = 5x + 11</h2>

Step-by-step explanation:

\text{The slope-intercept form of an equation of a line:}\\\\y=mx+b\\\\m-\text{slope}\\b-\text{y-intercept}\\\\\text{Let}\\\\k:y=m_1x+b_1\\l:y=m_2x+b_2\\\\k\ \perp\ l\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\\\k\ ||\ l\iff m_1=m_2\\=========================

\text{We have}\ y=5x+2\to m_1=5\\\\\text{therefore}\ m_2=5.\\\\\text{Put the value of the slope and the coordinates of the given point (-2, 1)}\\\text{to the equation of a line:}\\\\1=5(-2)+b\\1=-10+b\qquad\text{add 10 to both sides}\\1+10=-10+10+b\\11=b\to b=11\\\\\text{Finally:}\\\\y=5x+11

5 0
3 years ago
Milie mode 20 cookies for her class's porty, 8 of the
nadezda [96]

Answer:

40%

Step-by-step explanation:

It is 40% because 8/20 times 5 is 40/100 and that is 40%.

8 0
3 years ago
A=25,b=12,c=4,d=4: a +(b+c).d
stellarik [79]
B+c is 16
16 + 25 Is 41
I don't know d sorry
3 0
3 years ago
Read 2 more answers
solve for the indicated variable. include all of your work in your answer. submit your solution. P=2L+2W; for L.
allochka39001 [22]
We have this equation:

P=2L+2W

So, we need to solve this equation for L. Then we sum -2W in each member of the equation, like this:

P-2W=2L+2W-2W
P-2W=2L

Then, dividing the equation by 2:

\frac{P-2W}{2}=L

Finally, let's order this equation:


L=\frac{P-2W}{2}
4 0
2 years ago
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