1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
coldgirl [10]
3 years ago
12

Please help me with this. Use the combination method of substitution to solve. Please show and explain work. Thanks.

Mathematics
1 answer:
Artemon [7]3 years ago
6 0

Answer:

x = 25.35 (or 2129/84) and y = 4334.04 (or 121353/28)

Step-by-step explanation:

The given equations are set up and ready to go with substitution. Simply just plug in the first equation to the second equation as both are equal to y.

Step 1: Replace y in <em>y = 87x + 2129 </em>with <em>171x</em>

171x = 87x + 2129

Step 2: Subtract 87 x on both sides

84x = 2129

Step 3: Divide both sides by 84 to get x

x = 2129/84 or 25.35 (rounded)

To get y, simply plug in x into one of the 2 original equations. In this case, I will use the first equation:

y = 171 (25.35)

y = 121353/28 or 4334.04 (rounded)

You can check your work by plugging both solutions into the calculator and see if they equal each other. The values for these answers are solely based on the equations, so if you write the <em>equations </em>wrong themselves, then that means you have the values wrong as well.

You might be interested in
Combine the like terms to create an equivalent expression.<br><br> 10k+1+8k+2
o-na [289]
Once you combine like terms you are left with 18k +3.
7 0
3 years ago
Read 2 more answers
Determine the number of possible triangles, ABC, that can be formed given A = 30°, a = 4, and b = 10.
sweet [91]

Answer:

None

Step-by-step explanation:

We are given a triangle ABC with ∠A = 30°, sides a = 4 and b = 10.

According to the 'Law of Sines- Ambiguous Case', we have,

If a < b×sinA, then no triangle is possible.

If a = b×sinA, only one triangle is possible

If a > b×sinA, two triangles are possible.

So, we have,

b×sinA = 10 × sin30 = 10 × 0.5 = 5.

Now, as

4 = a < bsinA = 5.

We get, according to the rule, no triangle is possible.

4 0
2 years ago
Read 2 more answers
Daquan has $500 in a savings account at the beginning of the school year. He wants to keep at least $200 in the account by Decem
Evgen [1.6K]
The answer is 12 weeks
5 0
2 years ago
Read 2 more answers
A music store bought a CD set at a cost of​ $20. When the store sold the CD​ set, the percent markup was​ 40%. Find the selling
Damm [24]

Answer:

40% markup means the scale price is 1.40 times the cost. 1.40 ($20) = $28

Step-by-step explanation:

multiple the price by 1.40

hopefully this helped :)

7 0
3 years ago
Read 2 more answers
Solve; 6/7 - 3/14 = what?
Evgen [1.6K]
6/7 = 12/14;
Then, 12/14 - 3/14 = 9/14.
6 0
3 years ago
Other questions:
  • Use a factor tree to find the prime factorization of 36
    14·2 answers
  • - Shelia went snowboarding. She spent $118
    14·2 answers
  • What is the percentage of 2.47 out of 100
    12·2 answers
  • What is the circumference of a circle with a radius of 14in
    10·2 answers
  • Un granero con forma de prisma rectangular tiene las siguientes medidas:20 m de largo,16 m de ancho y 15 m de alto.Cuantos metro
    14·1 answer
  • 10.125 as a fraction
    9·2 answers
  • Create and solve a system of equations, solve for x and y.
    10·1 answer
  • Given the expression 5a2b2 − 13ab + 7a3 − 4b, do the following as instructed below:
    15·1 answer
  • Ninety-five percent of test scores fall between 72 and 85. Assuming the data is normally distributed, what is
    5·1 answer
  • A class has 4 boys and 10 girls. What is the ratio in the simplest form that compares a number of boys to a total number of stud
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!