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
LenKa [72]
3 years ago
12

How many solutions are there to the systems of equations below? (PLEASE ANSWER + 10 POINTS!!!)

Mathematics
2 answers:
krok68 [10]3 years ago
8 0

y = x² + 3x - 7

y - 5x + 8 → y = 5x - 8

5x - 8 = x² + 3x - 7 <em>substituted "y" in first equation with "5x - 8"</em>

0 = x² - 2x + 1 <em>subtracted 5x and added 8 to both sides</em>

0 = (x -1)(x - 1) <em>factored x² - 2x + 1 </em>

x = 1 <em>solved for "x"</em>

Now plug that "x = 1" into "y = 5x - 8" → y = 5(1) - 8 → y = 5 - 8 → y = -3

Solution is (1, -3) so there is only one solution.

Answer: C

ikadub [295]3 years ago
3 0
The answer to the question is c
You might be interested in
-8x+4y=28 solve for y
olga55 [171]
This is how I would do it:
-8x=28-4y divide the entire equation by 4
-2x=7-y Put y back on the left and put x on the right 
y=7-2x.
8 0
3 years ago
Read 2 more answers
Find the square of 111 base two give ur answer in base two​
ahrayia [7]

Answer: I'm not 100% sure what your asking but I believe the answer is 12321.

Step-by-step explanation:

7 0
2 years ago
I'm confused how you split the fraction
slava [35]
1/3 + 1/3 + 1/3 + 1/3 + 1/3 + 1/3 = 6/3 
8 0
3 years ago
Read 2 more answers
0.9 of Karen's Science score is equal to 0.75 of her Math score and 0.8 of her Chemistry score. Given that Karen scored 96 marks
DochEvi [55]

You have to formulate equations for this problem.

Let S = Science score

      M = Math score

       C = Chemistry score

To illustrate the given:

0.9S = 0.75M

0.9S = 0.8C

You are given that Karen’s Math score is 96 marks. You have to substitute the Math score to the first equation.

0.9S = 0.75(96)

0.9S = 72

S = 80

Therefore, Karen’s Science score is 80. Now, you have to substitute the Science score to the second equation.

0.9(80) = 0.8C

0.8C = 72

C = 90

So, Karen’s Chemistry score is 90.

Therefore, the total score of the 3 subjects is 266 (96 + 80 + 90).

5 0
3 years ago
A party rental company has chairs and tables for rent. The total cost to rent 5 chairs and 3 tables is $31.the total cost to ren
san4es73 [151]

Answer:

$1.25 & $10.25

Step-by-step explanation:

Let c be the cost of renting one chair and t be the cost of renting table. We're given two equations:

#1. 5c + 3t = 37

#2. 2c + 6t =64

We have a system of equations. Using our system of equations calculator, we can solve this problem any of 3 ways below:

  • Chairs (c) cost $1.25
  • Tables (t) cost $10.25
6 0
3 years ago
Other questions:
  • 3x + 8 = -x + 20 What is x?
    9·2 answers
  • In basketball, Anthony makes 1 out of every 4 throws he tries. What is the probability that Anthony will make his next 3 free th
    8·2 answers
  • Which set of sides will make a triangle?<br><br> -Middle School math-
    10·2 answers
  • What are three equivalent ratio for 12/14
    10·2 answers
  • Pls help
    15·2 answers
  • The length and breadth of a rectangular ground is 30 m and 20 m respectively.A boy moves around the ground 5 times early morning
    12·1 answer
  • Expand the expression<br> ​ 7(10s-10)
    13·1 answer
  • Look at picture and explain your answer
    14·1 answer
  • Find the mean, median, and mode of 3, 5, 1, 5, 1, 1, 2, 3, 15 after each data value increases by 4.
    14·1 answer
  • Help me find the figure , area formula and the area
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!