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LuckyWell [14K]
3 years ago
14

Solve each word problem using a system of equations. Use substitution or elimination.

Mathematics
1 answer:
nasty-shy [4]3 years ago
4 0

Answer:

Step-by-step explanation:

x + 3y = 24.....multiply by -1

5x + 3y = 36

------------------

-x - 3y = -24 (result of multiplying by -1)

5x + 3y = 36

------------------add

4x = 12

x = 12/4

x = 3 <=======

x + 3y = 24

3 + 3y = 24

3y = 24 - 3

3y = 21

y = 21/3

y = 7 <========

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Anyone help pls? No links! :)
Lunna [17]

Answer:

6. D

7. F

8.A

9. B

10 C

13.Question- Write an expression using division and subtraction with a difference of 3.

answer-  (12 divide 3) -1

  Twelve divided by three is four. Four minus 1 is three.

12. Question- Write an expression using multiplication and addition with a sum of 16.

answer- There are many answers for this and this is one of them:

Y=4(3+1)

Y=16

or

Y=2(6+2)

Y=16

11.  Question- Sam bought two CDs for $13 each. Sales tax for both CDs was $3. Write an expression to show how much Sam paid in all.

answer- Expression- (13*2)(3*2)=$32

This is the answer because Sam bought two CD's for 13, 13*2, and the sales tax was $ 3, so 3*2=6

4 0
3 years ago
Simplify the rational expression. state any excluded values. <br><br> x^2-3x-10/x+2
Natali5045456 [20]

Answer:

The answer to your question is  x - 5 or x = 5

Step-by-step explanation:

                                           \frac{x^{2} -3x - 10}{x + 2}

1.- Factor the numerator

                                       x² - 3x - 10

    find 2 numbers that added equal -3 and multiply equal -10.

    These numbers are -5 and + 2

                                     (x - 5)(x + 2)

2.- Simplify

                                     \frac{(x - 5)(x + 2)}{x + 2)}

Delete (x +2) in both numerator and denominator

3.- Result                       x - 5

                                      x = 5

7 0
3 years ago
Maxwell earns $99 for every 5.5 hours for work. How much will he earn if he works 30 hours this week (hint: find the unit rate,
kompoz [17]

\bf \begin{array}{ccll} \$&hours\\ \cline{1-2} 99&5.5\\ x&30 \end{array}\implies \cfrac{99}{x}=\cfrac{5.5}{30}\implies 2970=5.5x\implies \cfrac{2970}{5.5}=x\implies 540=x

7 0
3 years ago
Which of the following equations describe the line shown below? check all that apply!​
Schach [20]

Answer:

B and E are the correct answers.

Step-by-step explanation:

By using the slope formula of y₂₋y₁ / x₂₋x₁ you can find out that the slope is ₋7/4.

Next pick a point to put into point-slope form.

Point-slope form is y₋y₁ = m(x₋x₁) where y₁ and x₁ are a point on the graph and m is the slope.

Substitute both points into the formula (separately) to get B and E as your answers.

Hope this helps!

4 0
3 years ago
Write five numbers that round up to 600<br> write five numbers that round down to 600
Mkey [24]
Assuming we are rounding to the nearest 100, five numbers that could be rounded up to 600 are:
550, 567, 579, 580, 599
And five numbers that could be rounded down to 600 are:
601, 610, 625, 630, 649
4 0
3 years ago
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