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True [87]
3 years ago
12

Set up a system of linear equations, and then solve for the indicated quantities.

Mathematics
1 answer:
hichkok12 [17]3 years ago
7 0

9514 1404 393

Answer:

  • smaller: -4
  • larger: -1

Step-by-step explanation:

Substituting the given variables into the word problem, we have two equations:

  3x +3y = -15

  6x -3y = -21

Adding these equations eliminates y:

  9x = -36

  x = -4 . . . . divide by 9

Using this in the first equation, we have ...

  3(-4) +3y = -15

  -4 +y = -5 . . . . . divide by 3

  y = -1 . . . . . . . . . add 4

The smaller number is -4; the larger is -1.

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Find the discriminant of x^2+6x+13=0. What does this number tell you about how many real solutions there are to the equation? Sh
Lana71 [14]
Discriminant = sq root of b^2 - 4*a*c =
sq root of 36 - 4*1*13 =
sq root 36 -52 =
sq root 36 -52 =
sq root -16
There are no real solutions for this equation.  Both roots are complex numbers.








5 0
3 years ago
Read 2 more answers
What is 3,000 more than 150?
Scrat [10]

Answer:

<h2>3,150</h2>

Step-by-step explanation:

We need to find a number that is 3,000 more than 150. To do this set up an equation and let x = the result.

x = 150 + 3,000

x = 3,150

Check

3,150 = 150 + 3,000

3,150 = 3,150 Correct :)

<em>PLEASE MARK BRAINLIEST</em>

5 0
2 years ago
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kvv77 [185]
Answer: One pound of cinnamon costs $12.80
7 0
3 years ago
a semicircular flower bed has a diameter of 3m. What is the area of the flower bed. Give answer to one decimal place
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7 0
3 years ago
A culture is grown with a population of 45 million cells. The cell population is found to double every hour. What will the popul
Alexandra [31]
45 million * 2^{4} = 45million * 16 = 720million

Or you can use 
y=Ae^{kt}
A is equal to 45 million
To find the rate, k, we can plug in:
90million=45million*e^{k*1}&#10;
2=e^{k}
k=ln(2)
y=4.5*10^{7}*e^{t *ln2}
Knowing that t = 4
y = 4.5*10^{7}*e^{ln(2)*4}&#10;
y = 720 million
6 0
3 years ago
Read 2 more answers
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