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tatyana61 [14]
3 years ago
7

Evaluate the expression when x = 12 and y = 2 x/3y

Mathematics
1 answer:
professor190 [17]3 years ago
5 0
If you plug in 12 for x.
Your expression is y= 2(12)/3y
then you just solve for Y
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Lelechka [254]
164÷2=82
cliff drove 82+35=117
so therefore Edwin drove 164-117=47
4 0
3 years ago
Read 2 more answers
3 + 2x -y =0<br> -3 -7y = 10x​
sweet [91]

Answer:

(-1, 1)

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination
  • Solving systems of equations by graphing

Step-by-step explanation:

<u>Step 1: Define systems</u>

3 + 2x - y = 0

-3 - 7y = 10x

<u>Step 2: Rewrite systems</u>

3 + 2x - y = 0

  1. Add <em>y</em> to both sides:                    3 + 2x = y

<u>Step 3: Redefine systems</u>

y = 2x + 3

-3 - 7y = 10x

<u>Step 4: Solve for </u><em><u>x</u></em>

<em>Substitution</em>

  1. Substitute in <em>y</em>:                     -3 - 7(2x + 3) = 10x
  2. Distribute -7:                        -3 - 14x - 21 = 10x
  3. Combine like terms:            -14x - 24 = 10x
  4. Add 14x on both sides:        -24 = 24x
  5. Divide 24 on both sides:     -1 = x
  6. Rewrite:                                 x = -1

<u>Step 5: Solve for </u><em><u>y</u></em>

  1. Define original equation:                    -3 - 7y = 10x
  2. Substitute in <em>x</em>:                                     -3 - 7y = 10(-1)
  3. Multiply:                                                -3 - 7y = -10
  4. Add 3 to both sides:                            -7y = -7
  5. Divide -7 on both sides:                      y = 1

<u>Step 6: Graph</u>

<em>Check the solution set.</em>

4 0
2 years ago
Denise bought a T-shirt at the sale price of $24. The original cost of a T-shirt was $40. What percent represents the discount t
RoseWind [281]

Answer:

Step-by-step explanation:

we subtract to find how much they saved, 40-24=16

now we divide 16 by 40 to get the percent 16/40 = 0.4

40%

3 0
3 years ago
Please help last question
Len [333]

Answer:

A 5% possibility.

Step-by-step explanation:

Find all of the totals:

total male = 4+6+2+2=14

total female = 3+4+6+3=16

freshman = 4+3=7

sophomore = 6+4=10

Junior = 2+6=8

Senior = 2+3 = 5

total overall= 5+8+10+7+16+14=60

Female seniors are = 3

So 3/60 = 0.05=5%

6 0
3 years ago
2x + y = 3
Arlecino [84]
It’s d
You just have to keep on substitutes x or y . I added a picture hope that helps

3 0
3 years ago
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