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
bagirrra123 [75]
2 years ago
9

Which ordered pair is the solution to the system of equations?

Mathematics
1 answer:
r-ruslan [8.4K]2 years ago
8 0

Step-by-step explanation:

y = 2x - 15

4x + 3y = -5

4x + 3(2x - 15) = -5

4x + 6x - 45 = -5

10x = 40

x = 40/10

x = 4

y = 2x - 15

y = 2(4) - 15

y = 8 - 15

y = -7

Solution = (4,-7)

Option → C

You might be interested in
The measures of two supplementary angles are (3x + 9)° and (2x + 2)°. What is the measure of the smaller angle? A. 16.6° B. 69.6
s344n2d4d5 [400]

Answer:

B

Step-by-step explanation:

Supplementary angles sum to 180°, hence

3x + 9 + 2x + 2 = 180, that is

5x + 11 = 180 ( subtract 11 from both sides )

5x = 169 ( divide both sides by 5 )

x = 33.8

Hence the smaller angle has a measure of

2x + 2 = (2 × 33.8) + 2 = 67.6 + 2 = 69.6° → B

3 0
3 years ago
There are 5280 feet in a mile. how many feet are in 7/11 of a mile
pychu [463]
Number of feet in a mile multiplied by the percentage (7/11) equals number of feet in the 7/11 portion of a mile.

=5280 * 7/11
=(5280*7)/11
=36,960/11
=3,360 feet in 7/11 mile

Hope this helps! :)
6 0
3 years ago
15 pts. Prove that the function f from R to (0, oo) is bijective if - f(x)=x2 if r- Hint: each piece of the function helps to "c
solniwko [45]

Answer with explanation:

Given the function f from R  to (0,\infty)

f: R\rightarrow(0,\infty)

-f(x)=x^2

To prove that  the function is objective from R to  (0,\infty)

Proof:

f:(0,\infty )\rightarrow(0,\infty)

When we prove the function is bijective then we proves that function is one-one and onto.

First we prove that function is one-one

Let f(x_1)=f(x_2)

(x_1)^2=(x_2)^2

Cancel power on both side then we get

x_1=x_2

Hence, the function is one-one on domain [tex[(0,\infty)[/tex].

Now , we prove that function is onto function.

Let - f(x)=y

Then we get y=x^2

x=\sqrt y

The value of y is taken from (0,\infty)

Therefore, we can find pre image  for every value of y.

Hence, the function is onto function on domain (0,\infty)

Therefore, the given f:R\rightarrow(0.\infty) is bijective function on (0,\infty) not on  whole domain  R .

Hence, proved.

3 0
3 years ago
How would you classify the decimal form of 7/25?
olga55 [171]
The answer is C to the question
8 0
3 years ago
Read 2 more answers
Will mark brainly! 20 points please hurry and help!!
Nata [24]
The correct answer is number one, number four, and number five. Please park Brainliest if helpful. Thanks
6 0
2 years ago
Other questions:
  • melissa runs a landscaping business. She has equipment and fuel for $343 per month. If she charges $46 for each lawn, how many l
    5·1 answer
  • What is the algebraic expression for the quotient of 39 and x
    5·1 answer
  • I need help can you help me please
    5·2 answers
  • Need help for this. Math Alg
    9·1 answer
  • Help pleaseeeeeee!!!
    9·1 answer
  • Three sides are given: Use side lengths 6cm, 6cm, and 4cm. How many triangles can you make?
    13·1 answer
  • A machine produces small cans that are used for baked beans. The probabil- ity that the can is in perfect shape is 0.9. The prob
    13·1 answer
  • The height of the real table is <br> 48 inches. What is the height of the table in the scale model?
    13·1 answer
  • 3x - y = 9<br> Slope-intercept??
    9·1 answer
  • 2(r+3)=<br><br> Can u please help me solve this
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!