For the following system, use the second equation to make a substitution for x in the first equation.

1 answer:

3 0

The answer is B. In the second equation, when you solve for x, it will be equal to y - 3. Then substitute that with x and 3(y - 3) +2y = 7 is what you get.

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In the pictures down below Can anyone help? Fractions and percents

wariber [46]

1st Picture:
$3)- \frac{6}{7} +\frac {10}{11}
\\\\LCD:77
\\\\\frac{6}{7}* \frac{11}{11} + \frac{10}{11}*\frac{7}{7}= \frac{66}{77} + \frac{70}{77} = \frac{136}{77} = 1\frac{59}{77} 
 \\ \\ 4) 3\frac{6}{7}* 2 \frac{1}{10}= \frac{27}{7} * \frac{21}{10} = \frac{567}{70} =\frac{81}{10} = 8\frac{1}{10}
\\\\5)2\frac{1}{2}+3\frac{1}{3}
\\\\LCD: 6
\\\\ 2\frac{3}{6} + 3\frac{2}{6} =5\frac{5}{6}
\\\\6)5\frac{1}{8}*-6\frac{6}{11}=\frac{41}{8}* \frac{72}{11}=\frac{2952}{88}=\frac{369}{11}=33\frac{6}{11}$

2nd Picture:

$1)80 percent of 80 = .8*80 =64
\\\boxed{64}
\\\\2)95percent of 100=.95*100=95
\\\boxed{95}$

7 0

3 years ago

Evaluate c-2 when c =7

LenaWriter [7]

If C = 7, You would do 7-2 = 5

5 0

2 years ago

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Craig uses a ruler to determine the length of two pieces of metal. He records the length of each piece of metal as a rational nu

icang [17]

A. When adding two rational numbers a/b and c/d, the numerators a and c do not have to be integers. Therefore, the sum does not have to be a rational number. I think this is right might nor be :/

7 0

3 years ago

Does somebody know the answer to this question I’m lost

Shkiper50 [21]

Answer:

81b + 4 - 14/3b

Step-by-step explanation:

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7 0

2 years ago

Apply the distributive property to create an equivalent expression. (6m -7)\cdot 4 =(6m−7)⋅4=left parenthesis, 6, m, minus, 7, r

FrozenT [24]

Answer:

$(6m-7)\cdot4$ is equivalent to 24m-28

Step-by-step explanation:

The distributive property enables us get rid of parentheses by multiplying the term outside by each of the term inside; a bit like algebraic expansion

It states that:

$(a+b)\cdot c = a\cdot c+ b\cdot c$

Therefore $(6m-7)\cdot4=6m\cdot4-7\cdot4=24m-28$

Thus 24m-28 is the equivalent expression

8 0

3 years ago

Read 2 more answers