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
kondaur [170]
3 years ago
13

Solve systems of equations for y and x: −5y + 8x = −18 5y + 2x = 58​

Mathematics
1 answer:
Natali5045456 [20]3 years ago
7 0

Answer:

(4, 10)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

Equality Properties<u> </u>

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Coordinates (x, y)
  • Coefficients
  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

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

-5y + 8x = -18

5y + 2x = 58

<u>Step 2: Solve for </u><em><u>x</u></em>

<em>Elimination</em>

  1. Combine 2 equations:                                                                                      10x = 40
  2. [Division Property of Equality] Divide 10 on both sides:                                x = 4

<u>Step 3: Solve for </u><em><u>y</u></em>

  1. Substitute in <em>x</em> [Original equation]:                                                                  -5y + 8(4) = -18
  2. Multiply:                                                                                                             -5y + 32 = -18
  3. [Subtraction Property of Equality] Subtract 32 on both sides:                      -5y = -50
  4. [Division Property of Equality] Divide -5 on both sides:                                y = 10
You might be interested in
What is the volume of a volleyball with a diameter of 8 inches
natita [175]

Hello there!

We are going to follow the volume of a sphere since a volleyball is a sphere. V=4/3πr^3 is the formula for finding the volume of a sphere. The only unknown value is r, or the radius. We find the radius by halving the diameter.

8/2 = 4, so we have a radius of 4 inches.

Place the value of 4 in for r - V = 4/3 x π x (4)^3

Now solve.

V = 4/3 x π x (4)^3

Start by squaring 4.

V = 4/3 x π x 64

Next, multiply 4/3 by 64. (<em>you can do it in any order since there are no parenthesis</em>)

V = π x 85.33

Lastly, multiply 85.33 by pi.

V = 268.08

So, your answer is approximately 268.08, since we used rounding it is not exact. I hope this was helpful and have a great rest of your day! :)

8 0
3 years ago
6. What is the result of multiplying the digit in the hundredths place by
Setler [38]

Answer:

B.9

Step-by-step explanation:

9*1=9

6 0
3 years ago
Please help me thank you and show all work
AleksAgata [21]
Proportional:
82.8 / 92 = 0.9
73.8 / 82 = 0.9
so
FG / 47 = 0.9
FG = 47 * 0.9
FG = 42.3

answer

The distance between 2 campsites is 42.3 m.



8 0
3 years ago
Proportions in Triangles (8)
pishuonlain [190]

Answer:

not really sure maybe 12

4 0
3 years ago
Read 2 more answers
Find the value of 4(5)+12÷3 (8)+2 (-4)
Firlakuza [10]
The answer is 44 because all you have to do is use PEMDAS to solve the equation
6 0
3 years ago
Read 2 more answers
Other questions:
  • “Do you think mathematics is a useful way to measure risks?”
    7·1 answer
  • I NEED HELP FAST!
    13·1 answer
  • Shade the grid to represent the<br> decimal 0.8<br> Write the decimal in words.
    7·1 answer
  • Anna is buying supplies to mail a gift to a friend who lives in California. First, she buys a shipping box for $4.95 and bubble
    6·2 answers
  • The sum of a number and its additive inverse is equal to ?
    7·1 answer
  • Find f(x) and g(x) so that the function can be described as y = f(g(x)). y=8/x^2 +2
    12·1 answer
  • What is the base of a triangle that has an area of 60 square centimeters and a height of 8 centimeters?
    6·1 answer
  • 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
    13·1 answer
  • In July, a new endoscopy and electrophysiological lab are opening up. It is projected 60 endoscopies and 5 EP studies will be pe
    11·1 answer
  • A store gave away 1932 calendars in seven days they gave away the same number of calories each day how many calendars in the sto
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!