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Artyom0805 [142]
3 years ago
10

Which equations have the same value of x as Three-fifths (30 x minus 15) = 72? Select three options.

Mathematics
2 answers:
DanielleElmas [232]3 years ago
6 0

Answer:

C 18 x minus 9 = 72

D 3 (6 x minus 3) = 72

E   x = 4.5

Step-by-step explanation:

Hope this helped

pshichka [43]3 years ago
3 0

Answer:

Its C,D,E and A I think

Step-by-step explanation:

hope it helped have a great day! god bless!

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Explain how you know which method you should use to solve a rational equation.
notsponge [240]

<u>Methods to solve rational equation:</u>

Rational equation:

A rational equation is an equation containing at least one rational expression.

Method 1:

The method for solving rational equations is to rewrite the rational expressions in terms of a common denominator. Then, since we know the numerators are equal, we can solve for the variable.

For example,

\frac{1}{2}=\frac{x}{2}\Rightarrow x=1

This can be used for rational equations with polynomials too.

For example,

\frac{1+x}{x-3}=\frac{4}{x-3}\Rightarrow(1+x)=4 \Rightarrow x=3

When the terms in a rational equation have unlike denominators, solving the equation will be as follows

\frac{x+2}{8}=\frac{3}{4}

\Rightarrow\frac{x+2}{1}=\frac{3\times8}{4}\Rightarrow{x+2}=2\times3

\Rightarrow{x+2}=6\Rightarrow x=6-2\Rightarrow x=4

Method 2:

Another way of solving the above equation is by finding least common denominator (LCD)

\frac{x+2}{8}=\frac{3}{4}

Factors of 4: 1\times2\times2

Factors of 8: 1\times2\times2\times2

The LCD of 4 and 8 is 8. So, we have to make the right hand side denominator as 8. This is done by the following step,

\Rightarrow\frac{x+2}{8}=\frac{3}{4}\times{2}{2}

we get,

\Rightarrow\frac{x+2}{8}=\frac{6}{8}

On cancelling 8 on both sides we get,

\Rightarrow(x+2)=6\rightarrow x=6-2\rightarrow x=4

Hence, these are the ways to solve a rational equation.

7 0
3 years ago
The ordered pair(5,-3) is a solution to which of the following inequalities?
Dmitrij [34]

A plumber worked 26 hours a week for half a year. If his hourly wage was $40, how much did he earn during this time period?

<span> <span>A.</span>$1040</span><span> <span>B.</span>$27,040</span><span> <span>C.</span>$54,080</span><span> <span>D.</span><span>$520</span></span>
7 0
3 years ago
Wha bout dis one????/
PolarNik [594]
6-3=3, so m=3. Easy as pie
5 0
3 years ago
Please Help me with these 2 questions!!
qaws [65]

Answer:

3) Parabola

4) y = 5x^2 + 7   and   y = \frac{10}{x} +20

4 0
2 years ago
Read 2 more answers
HELPPPP ME PLEASE!!!!!!!
viktelen [127]

Answer:

x = 7

Step-by-step explanation:

Given 2 intersecting chords, then

The product of the parts of one chord is equal to the product of the parts of the other chord, that is

27x = 9 × 21 = 189 ( divide both sides by 27 )

x = 7

6 0
3 years ago
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