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Kruka [31]
3 years ago
10

Solve using the Quadratic Formula: 3x2 + 3x - 6 - 0 -2, 1 1, 2 -3, 9 -3, -9

Mathematics
1 answer:
AysviL [449]3 years ago
6 0
Assuming that the equation is 3x^2+3x-6=0, then use the quadratic equation, (-b+- sqrt(b^2-4ac))/2a, with ax^2+bx+c as the original equation. so here we get (-3+-sqrt(9+72))/6 = (-3+-sqrt(81))/6 = (-3+-9)/6, = (-1+-3)/2 = 1 or -2. Plug in original to check.
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Assume abc=def. if ab=5, ac=9 and ef=7, what is the length of bc?​
horsena [70]

Answer:

bc=  7

Step-by-step explanation:

4 0
3 years ago
Is the expression 15 x 157 equivalent to<br> (15 x 15)??<br> ? Explain<br> Chann
Inessa05 [86]

Answer:

no

Step-by-step explanation:

15 x 15 would be way less that 15 x 157

15 x 15 is just 15 + 15 + 15..... 15 times

15 x 157 is 15 + 15 + 15..... 157 times

15 x 15 = 225

15 x 157 = 2355

8 0
2 years ago
The drama club sold 1500 tickets for the end-of-the-year performance. Admission prices were $12 for adults and $6 for students.
Zepler [3.9K]

The system of equations to determine the number of adult tickets, a, and the number of student tickets, s, the drama club sold is a + s = 1500; 12a + 6s = 16,200. 300 students attended the play.

<h3>Simultaneous equation</h3>

  • number of adult tickets = a
  • number of student tickets = s

The system of equation:

a + s = 1500

a + s = 150012a + 6s = 16,200

From equation (1)

a = 1500 - s

Substitute into (2)

12a + 6s = 16,200

12(1500 - s) + 6s = 16,200

18,000 - 12s + 6s = 16200

- 12s + 6s = 16200 - 18,000

-6s = -1800

s = -1800 / -6

s = 300

Substitute s = 300 into (1)

a + s = 1500

a + 300 = 1500

a = 1500 - 300

a = 1200

Therefore, there are 300 students and 1200 adults at the play respectively.

Learn more about simultaneous equation:

brainly.com/question/16863577

#SPJ1

8 0
2 years ago
Translate the sentence into an inequality.<br> A number b divided by 7 is at least – 16.
Allisa [31]

Answer:

Step-by-step explanation:

\frac{b}{7} ≥ - 16

4 0
3 years ago
Read 2 more answers
the train to hogwarts is moving at a speed of 120 mph. if hogwarts is 420 miles away, how long will the students train ride be ?
dexar [7]

Answer:

The train ride is 3.5 hours

Step-by-step explanation:

We know that distance is equal to rate times time

d = rt

We know the distance and the rate

420 = 120*t

Divide each side by 120

420/120 = 120t/120

3.5 =t

The train ride is 3.5 hours

4 0
3 years ago
Read 2 more answers
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