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
KatRina [158]
3 years ago
6

Solve each system of equations 2x- 5y = 7 3x - y = -9

Mathematics
1 answer:
Darina [25.2K]3 years ago
8 0

Answer:

x = -4; y = -3

Step-by-step explanation:

2x - 5y = 7

3x - y = -9

Rewrite top equation. Multiply both sides of bottom equation by -5. Add equations. This eliminates y, and we solve for x.

         2x - 5y = 7

(+)   -15x + 5y = 45

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

      -13x         = 52

Divide both sides by -13.

x = -4

Substitute -4 for x in the first original equation and solve for y.

2x - 5y = 7

2(-4) - 5y = 7

-8 - 5y = 7

-5y = 15

y = -3

Answer: x = -4; y = -3

-5 =

You might be interested in
Leon drew AABC and ADEF so that ZA: LD, ZB: LE, AB = 4, and DE = 8.
yulyashka [42]

Answer:

A. similar - AA

there's two corresponding angle that are equal!

4 0
3 years ago
What is the interest rate if the principal is $25,000, the interest is $10,875, and the time is 15 years?
mel-nik [20]

Answer:

interest rate = 2.9%

Step-by-step explanation:

the principal is $25,000, the interest is $10,875

Number of years = 15

We use simple interest formula

I = P*r*t

Where I is the interest amount=10,875

P is the principal amount= 25000

r is the interest rate = r

t is the number of years = 15

Plug in all the value in the formula

I = P*r*t

10875 = 25000 * r * 15

10875 = 375000 * r

Divide both sides by 375000

r=0.029

We always write rate of interest in percentage so we multiply by 100

0.029 * 100= 2.9%

So interest rate = 2.9%



8 0
2 years ago
In 2011, Americans spent approximately $50.9 billion on their pets. Of this amount, $14.1 billion was for veterinarian bills. Wh
alex41 [277]

Answer: The percent of the total was spent on veterinarian bills is 27.70% ( approx).

Step-by-step explanation:

Given, In 2011, Americans spent approximately $50.9 billion on their pets.

i.e. Total amount they spent on pets = $50.9 billion

Amount spent for veterinarian bills.  = $14.1 billion was for veterinarian bills.

Then, the percent of the total was spent on veterinarian bills would be :

\dfrac{\text{Amount spent for veterinarian bills. }}{\text{Total amount they spent on pets}}\times100\\\\=\dfrac{14.1}{50.9}\times100\\\\=27.7013752456\approx27.70\%

Hence, the percent of the total was spent on veterinarian bills is 27.70% (approx).

5 0
3 years ago
What is the equation of this line?
quester [9]

A. y = 2x - 3

This is the correct answer

4 0
3 years ago
You have 3 gallons of brown stock. You need 6 cups to make one serving of braised short ribs. How many servings can you make?
Vilka [71]

Answer: 8 servings can be made

Step-by-step explanation:

Concept:

As we can see from the question there are two different units applied [gallons] and [cups]; therefore, we need to do the unit conversion.

<u>1 gallon = 16 cups</u>

Solve:

Given there are 3 gallons of brown stock, we need to convert gallons into cups.

  • 1 gallon = 16 cups
  • 3 gallons = 16 × 3 = 48 cups

Then, divide 48 cups by 6 cups to find out how many servings can be made.

  • 48 cups / 6 cups = 8 servings

Hope this helps!! :)

Please let me know if you have any questions

6 0
2 years ago
Other questions:
  • An executive committee consists of 1313 ​members: 55 men and 88 women. 44 members are selected at random to attend a meeting in
    15·1 answer
  • When x=1/2, what is the value of 8x-3/x
    8·1 answer
  • First letter of word best fits a mark left after injured tissue has healed
    10·2 answers
  • Need Help ASAP PLEASE ILL MARK BRAINLIEST IF ITS CORRECT PLEASE HELP!!!
    13·1 answer
  • Four more than twice a number is 8
    15·2 answers
  • Modeling Radioactive Decay In Exercise, complete the table for each radioactive isotope.
    12·1 answer
  • Which of the following is an equation of the line through (-4, 12) parallel to the line y= - 4x - 4?
    12·1 answer
  • Which of the following illustrates the inverse property of addition?
    12·1 answer
  • The l.c.m and h.c.f of two numbers is 9 times their HCF. The sum of LCM and HCF is 500. Find the HCF of two numbers.​
    10·1 answer
  • Suppose you deposit $2,000 in a savings account that pays interest at an annual rate of 6%. If no money is added or withdrawn fr
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!