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2 years ago

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One month, a homeowner used 150 units of gas and 520 units of electric for a total cost of $84.20. The next month, 210 units of

gas and 405 units of electric were used for a total cost of $82.35. Find the cost per unit of gas and electric.

1 answer:

Tom [10]2 years ago

4 0

Answer:

gas = $0.23, electricity = $0.10

Step-by-step explanation:

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vladimir1956 [14]

Create a conversion factor from "<span>There are 6.02 × 10^23 atoms in 1 gram of hydrogen:"

6.02*10^23 atoms
-------------------------
1 gram

Then mult. 800 grams by this conversion factor:

</span>6.02*10^23 atoms 800 grams
------------------------- * ----------------
1 gram 1

This comes out to 4816*10^23 atoms, which, in scientific notation, is

4.816*10^26 atoms.

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3 years ago

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Plz help me with this

forsale [732]

Answer:

$\frac{31x}{30}$

Step-by-step explanation:

Before adding we require the fractions to have a common denominator

The lowest common denominator of 2, 5 and 3 is 30, thus

$\frac{15x}{15(2)}$ + $\frac{6x}{6(5)}$ + $\frac{10x}{10(3)}$

= $\frac{15x}{30}$ + $\frac{6x}{30}$ + $\frac{10x}{30}$

Add the numerators leaving the denominator

= $\frac{15x+6x+10x}{30}$ = $\frac{31x}{30}$

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3 years ago

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What is the difference of the rational expressions below?

Korolek [52]

Answer:

in the pic

Step-by-step explanation:

answer A

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3 years ago

Given f (x) =2x-3 what is f(-15) <br><br> A. -16<br> B. -13<br> C. 7<br> D. 30

Murljashka [212]

Letter d is the answer.

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3 years ago

A right rectangular prism is 5 1/4 in. wide, 12 1 2 in. long, and 4 in. tall.

lozanna [386]

Answer: $V = 262\frac{1}{2}$ $cm^{3}$

Step-by-step explanation:

$V = LWH$

$V = 5\frac{1}{4}$ X $12\frac{1}{2}$ X 4

$V = \frac{21}{4}$ X $\frac{25}{2}$ X $\frac{4}{1}$

$V = \frac{525}{2}$

$V = 262\frac{1}{2}$ $cm^{3}$

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3 years ago