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Andrej [43]
3 years ago
10

-3(8)+5y=-24 using elimination ​

Mathematics
2 answers:
Step2247 [10]3 years ago
5 0

Answer:

y=0

Step-by-step explanation:

-3(8) + 5y = -24

-24 + 5y = -24

y=0

Elden [556K]3 years ago
5 0

\bold{Answer}

\boxed{\bold{Y \ = \ 0}}

\bold{Explanation}

  • \bold{Solve: \ -3\left(8\right)+5y=-24}

\bold{------------------}

  • \bold{Remove \ Parenthesis \ (a) \ = \ a}

\bold{-3\cdot \:8+5y=-24}

  • \bold{Multiply \ Numbers: \ 3\cdot \:8=24}

\bold{-24+5y=-2}

  • \bold{Add \ 24 \ To \ Both \ Sides}

\bold{-24+5y=-2}

  • \bold{Simplify}

\bold{5y=0}

  • \bold{Divide \ Both \ Sides \ By \ 5}

\bold{\frac{5y}{5}=\frac{0}{5}}

  • \bold{Simplify}

\bold{Y \ = \ 0}

\boxed{\bold{Eclipsed}}

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Jenny bought 3 CDs that were each the same price. Including sales tax, she paid a total of $45.30 Of that total, $1.50 was tax.
enot [183]

Answer:

$13.6

Step-by-step explanation:

Jane bought 3 CDs that were each the same price. So let the price of each CD be ‘x’.

It is given that including sales tax, she paid a total of $45.30.

Also each CD had a tax of $1.50. We need to find out what the price of each CD was before tax.

Since the tax for all 3 CDs was same, the total amount of tax that she paid was:

3 * 1.50 = 4.50

Therefore the total tax on 3 CDs is $4.50

Since we already know the total price she paid for the CDs including taxes, we can find the price of each CD by the following way:

3x + 4.50 = 45.30

3x = 45.30 - 4.50

3x = 40.8

x = 13.6

Therefore the price of each CD before tax is $13.6.

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3 years ago
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Step-by-step explanation:

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7 0
4 years ago
In order to test for the significance of a regression model involving 3 independent variables and 47 observations, the numerator
matrenka [14]

Answer:

The correct option is  C

Step-by-step explanation:

From the question we are told that

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     The number of observation is  z =  47

     

Since n is are independent variables then their degree of freedom is  3

   The  denominator(i.e z) degrees of freedom is evaluated as

            Df(z) =  z - (n +1)

          Df(z) =  47 - (3 +1)

          Df(z) =  43

So for the numerator (n) the degree of freedom is  Df(n) = 3

So for the denominator(i.e z) the degree of freedom is  Df(z) = 43

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The total cost is $(11.99x+12.99y).

Sarah can spend up to $65. Then an inequality that represents this situation is

11.99x+12.99y≤65 (this inequality holds when Sarah can spend $65 too)

or

11.99x+12.99y<65 (this inequality holds when Sarah can spend less than $65).

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Answer:

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