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Leviafan [203]
3 years ago
9

a cellphone company charges $49.99 per month plus 10 cents for texting. write and solve an equation to determine how many texts

were used in a month if the monthly bill was $79.99
Mathematics
1 answer:
slavikrds [6]3 years ago
8 0

Answer:

(79.99 - 49.99) \div.10

Answer to equation: 30

Step-by-step explanation:

(79.99 - 49.99) = 30.00

(30.00 \div .10) = 30.1

which is equivalent to 30 texts.

Hope this helps : )

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A contractor combined x tons of a gravel mixture that contained 10 percent gravel G, by weight, with y tons of a mixture that co
White raven [17]

Answer:

The value of x would be \frac{3}{5}y or \frac{3}{8}z

Step-by-step explanation:

Given,

x tons of 10% gravel G mixture is mixed with y ton of 2% gravel G to obtain  5% gravel mixture,

Thus, gravel G in x ton + gravel in y ton = gravel G in the resultant mixture,          

⇒ 0.1x + 0.02y = 0.05(x+y),

0.1x - 0.05x = 0.05y - 0.02y

0.05x = 0.03y

\implies x = \frac{0.03}{0.05}y=\frac{3}{5}y----(1)

Now, resultant mixture is z ton,

i.e. z=x+y

\implies y = z - x

From equation (1),

x=\frac{3}{5}(z-x) = \frac{3}{5}z-\frac{3}{5}x

x+\frac{3}{5}x=\frac{3}{5}z

\frac{8}{5}x=\frac{3}{5}z

x=\frac{3}{8}z

3 0
3 years ago
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Answer:

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Step-by-step explanation:

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