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densk [106]
3 years ago
14

Cookies are on sale! Today each cookie costs $0.75 less than the normal price. Right now if you buy 7 of them it will only cost

you $2.80.Write an equation to determine the normal price of each cookie with (c).
I REALLY NEED HELP PLEASE
Mathematics
1 answer:
lina2011 [118]3 years ago
6 0

today's price is c - 0.75

7(c - 0.75) = 2.8

c - 0.75 = 0.4

c = 1.15

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Sergio [31]
First take the fractions and find their common denominator:
\frac{1}{2} x 4 =\frac{4}{8}

Now you can add the fractions:
\frac{4}{8} + \frac{1}{8} = \frac{5}{8}

Now add your whole numbers and the fraction:
1+1= 2 >> 2+\frac{5}{8} = 2\frac{5}{8} yards

Now subract 2\frac{5}{8} from 5:
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4 0
3 years ago
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Is this equation linear: 2x+5xy-3=0
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What is linear equation?

An equation between two variables that gives a straight line when plotted on a graph.

2x + 5xy - 3 = 0

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According to the graph i don't think it's a linear equation.

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3 years ago
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DedPeter [7]

Answer:

C. AB = 5.8 cm

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In trapezoid ABCD, EF is the Midsegment.

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:: 9.2 x 2 = AB + 12.6

.. 18.4 = AB + 12.6

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6 0
2 years ago
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A 2 -gallon container of window costs 31.36. what is the price per cup
irinina [24]

Answer:

0.98 $/cup

Step-by-step explanation:

The final answer asks for price/cup, as "per" means "divided by".

So, our final units will be in $/cup.

We are given that for every 2 gallons, it will cost $31.36.

In order to get from gallons to cups, we need to convert units.

In 1 gallon, there are 16 cups.

So, our conversion factor will be 16 cups/1 gallon.

\frac{31.36}{2} *\frac{1}{16} \\\\= 0.98$/cup

Important things to note:

- With these types of problems, it makes it much easier if you just figure out what units you need in the final answer, and then use conversions and dimensional analysis to get the answer

8 0
2 years ago
Explain what the mean absolute deviation is in general. Explain what the MAD means in the context of Robin and Evelyn’s data.
sergij07 [2.7K]

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