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
Mariana [72]
3 years ago
15

Solve the system by substitution. 2.5x-3y=-13 3.25x-y=-14

Mathematics
1 answer:
MrMuchimi3 years ago
4 0

Answer:

x=-4

y=1

Step-by-step explanation:

For the given system of equations,

2.5x-3y=-13.....eqn(1)

3.25x-y=-14.....eqn(2)

We first make y the subject of eqn (2)

This implies that,

y=3.25x+14.....eqn(3)

We substitute eqn (3) into eqn (1)

2.5x-3(3.25x+14)=-13

2.5x-9.75x-42=-13

-42+13=9.75x-2.5x

-29=7.25x

Dividing through by 7.25, we obtain

x=-4

We now put the value of x into eqn (2)

3.25(-4)-y=-14

This implies that,

-13+14=y

y=1

You might be interested in
What is 62% of 25 ?<br> im horrible at this plz help
hodyreva [135]
62% of 25

'of' means multiplication.

\sf 62\%\times 25

Convert 62% to a decimal, divide it by 100(since percentages are parts of 100):

62/100 = 0.62

\sf 0.62\times 25

Multiply:

\sf\boxed{\sf 15.5}
4 0
4 years ago
Read 2 more answers
PQRS is a parallelogram. If mQRS = (9x - 20)° and
ivolga24 [154]

Answer:

x = 8.5

Step-by-step explanation:

In this question, we are to calculate the value of x.

To calculate this, we shall be utilizing one of the important properties of parallelogram.

This property is that opposite angles of a parallelogram are equal.

This means that mQSR = mSPQ = 4x + 90

Now to finally calculate x, we make use of another important parallelogram property which is that angles of parallelogram which faces each other are supplementary.

This means that they add up to be 180

Since mQSR faces mQRS

This means that;

4x + 90 + 9x -20 = 180

13x + 70 = 180

13x = 110

x = 110/13 which is approximately 8.5

8 0
3 years ago
A rectangular garage is 6 meters long and 5 meters wide. What is its area?
Sunny_sXe [5.5K]

Answer:

30 meters

Step-by-step explanation:

You MUST multiply 5 and 6 to get 30 to find area you have to multiply length times width

8 0
4 years ago
Read 2 more answers
What is the fifth term of (x-2y)^7
Vladimir79 [104]

Answer:

560x^3y^4.

Step-by-step explanation:

The (r+1)th term of (a + b)^r = nCr a^(n-r) b^r

We want the fifth term so r = 5 - 1 = 4:

(4 + 1)th term = 7C4 x^(7-4) (-2y)^4

= 35x^3 16y^4

= 560x^3y^4.

3 0
3 years ago
The circle below has center h. Suppose that
Mandarinka [93]
Write full questions is that....
5 0
4 years ago
Other questions:
  • Please help me i dont no what to do help please
    10·1 answer
  • Identify the value of y and the length of each chord. HELP ASAP!!
    6·2 answers
  • Greatest common factor <br> of 15.
    7·1 answer
  • Can someone please solve this. I don't know how to do it. <br><br>(-8)^2/3​
    10·1 answer
  • Jalissa bought a backpack for $30 and n notebooks for $2.50 each.
    8·2 answers
  • How to figure out Composite figures
    11·2 answers
  • How do you get 0.6<br> Out of 3 over 5
    12·1 answer
  • Describe the key features of the graph of the quadratic function f(x) = x2 - 8x - 20
    7·1 answer
  • Can someone help me with this
    8·1 answer
  • 1 1/18 + 3 1/18 + 1 2/9 + 1 2/9
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!