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anastassius [24]
3 years ago
5

Please help me answer this question

Mathematics
2 answers:
Salsk061 [2.6K]3 years ago
8 0
4x+y=-9
4(k)+3=-9
4k=-12
k=-3
ohaa [14]3 years ago
6 0

Answer:

k= -3

Step-by-step explanation:


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How much alcohol is there in 30 liters of a 45% alcohol solution?
zaharov [31]

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Answer: 60%

Step-by-step explanation:

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Let f(x)= x^2 -2x+6 find f(-1)
Leokris [45]

Answer:

Step-by-step explanation:

f(x) = x^2 - 2x + 6

to find f(-1), we sub in -1 for every x

f(-1) = (-1^2) - 2(-1) + 6

f(-1) = 1 + 2 + 6

f(-1) = 9 <=======

8 0
3 years ago
Can anyone help me with this geometry question?
Serhud [2]

Answer:

49-31 gets you da answer

yw

Step-by-step explanation:

6 0
3 years ago
3 times the measure of an angle is 14 less than the measure of its complement. What is the measure of the angle?
Sedbober [7]
Let the measure of the angle be x and from that the measure of its complement is 90 - x. The equation that best represent the given condition above is,
                            3x = (90 - x) - 14
The value of x from the equation above is 19. Thus, the answer is letter A. 
7 0
3 years ago
Widget Wonders produces widgets. They have found that the cost, c(x), of making x widgets is a quadratic function in terms of x.
AnnyKZ [126]

The total cost of producing 6 widgets is $24 if the company also discovered that it costs $16 to produce 2 widgets, $18 to produce 4 widgets, and $48 to produce 10 widgets.

<h3>What is a quadratic equation?</h3>

Any equation of the form \rm ax^2+bx+c=0  where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.

As we know, the formula for the roots of the quadratic equation is given by:

\rm x = \dfrac{-b \pm\sqrt{b^2-4ac}}{2a}

Let's suppose the quadratic function is:

c(x) = ax² + bx + c

Plug c(x) = $16

x = 2

16 = 4a + 2b + c ...(1)

Plug c(x) = $18

x = 4

18 = 16a + 4b + c ...(2)

Plug c(x) = $48

x = 10

48 = 100a + 10b + c ...(3)

After solving equations (1), (2), and (3) by substitution method:

a = 0.5

b = -2

c = 18

c(x) = 0.5x² -2x + 18

Plug x = 6 widgets:

c(6) = 0.5(36) - 12 + 18 = $24

Thus, the total cost of producing 6 widgets is $24 if the company also discovered that it costs $16 to produce 2 widgets, $18 to produce 4 widgets, and $48 to produce 10 widgets.

Learn more about quadratic equations here:

brainly.com/question/2263981

#SPJ1

5 0
2 years ago
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