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
Tanya [424]
3 years ago
13

I’m confused can ya help me

Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
7 0

Answer:

C & D

Step-by-step explanation:

x² + 3x - 3 = 0

a = co efficient of  x² = 1

b=  co efficient of x = 3

c = constant = -3

roots = (-b ± \sqrt{b-4ac})/2a

    = (-3±\sqrt{3^{2}-4*1*[-3]} )/2*1

    = (-3±\sqrt{9+12})/2

    = (-3±√21)/2

  x = \frac{-3+\sqrt{21}}{2}     ; x =\frac{-3-\sqrt{21}}{2}

You might be interested in
Perform the operation.<br> (8x2 – 7x – 2) – (6x2 – x + 3)
rewona [7]

Answer:

2 x² - 6x -5

Step-by-step explanation:

<u><em>Expansion:-</em></u>

Given that the expression

                    (8x²-7x-2)-(6x²-x+3)

                = 8x² - 6x² - 7x +x -2 -3

               = 2 x² - 6x -5

5 0
2 years ago
At short company has initial costs of $800 per month and it costs them $1.50 per shirt. Let y represent the cost to run the comp
adelina 88 [10]

Answer:

A. y = $800 + $1.50x

B. The cost to run the company each month = y

C. The initial cost ($800) plus the cost of each t-shirt ($1.50) and the number of t-shirts (x)

Step-by-step explanation:

I hope this helps :)

4 0
2 years ago
Last year, William earned $16.80 per hour working at his job. This year he received a 5% raise. Every day, he swipes his metro c
tester [92]

Answer:c

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
The ratio of the number of boys to the number of girls at school is 4:5. a. What fraction of the students are boys? b. If there
Sergio [31]

Answer: a. 4/9

b. 270 students

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
The diameter of a circle has endpoints P(-12, -4) and Q(6, 12).
nexus9112 [7]

9514 1404 393

Answer:

  (x +3)² +(y -4)² = 145

Step-by-step explanation:

The center of the circle is the midpoint of the given segment PQ. If we call that point A, then ...

  A = (P +Q)/2

  A = ((-12, -4) +(6, 12))/2 = (-12+6, -4+12)/2 = (-6, 8)/2

  A = (-3, 4)

The equation of the circle for some radius r is ...

  (x -(-3))² +(y -4)² = r² . . . . . . where (-3, 4) is the center of the circle

The value of r² can be found by substituting either of the points on the circle. If we use Q, then we have ...

  (6 +3)² +(12 -4)² = r² = 9² +8²

  r² = 81 +64 = 145

Then the equation of the circle is ...

  (x +3)² +(y -4)² = 145

3 0
3 years ago
Other questions:
  • How to do expanded form and word for for 119 000 003
    12·1 answer
  • -k+3k please help, middle school math
    10·1 answer
  • Which type of cross section is formed when the cone is intersected by a plane containing the axis of rotation?
    7·1 answer
  • A rock climber is climbing up a 450 feet high
    10·1 answer
  • Do any of you guys know what 27-9x+15y is need help solving it I’m stuck on it?
    5·1 answer
  • If mark has 3 friends help him paint his garage it will take 60 minutes how long will it take if he has 4 friends help him
    7·1 answer
  • Mae Ling earns a weekly salary of $375 plus a 7.0% commission on sales at a gift shop. How much would she make in a work week if
    10·1 answer
  • I need help............,<br>only question no.12​
    12·1 answer
  • A room measures 15 ft by 20 ft by 10 ft. If a basketball has a diameter of 9.6 inches, approximately how many basketballs will b
    13·1 answer
  • Factor completely x2 − 36. (x 6)(x − 6) (x 6)(x 6) (x − 6)(x − 6) Prime.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!