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Bingel [31]
3 years ago
12

Which of these equations represent functions? Check all that apply.

Mathematics
1 answer:
AVprozaik [17]3 years ago
5 0
A is quadratic function
B is equation of a circle
C is equation of a line
D is hiperbolic funciotn
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Diana had a large stack of playing cards. She knew that 17 of them were kings. She took a sample of 30 cards and found 4 kings.
Mandarinka [93]

Answer:

Diana approximately had 128 cards

Step-by-step explanation:

Let n  be the number of cards Diana had. She knows that

  • there are 17 kings among n cards
  • 4 kings among 30 cards

Write a proportion:

\dfrac{17}{n}=\dfrac{4}{30}

Cross multiply:

4n=17\cdot 30\\ \\4n=510\\ \\n=\dfrac{510}{4}=127.5\approx 128

5 0
3 years ago
What is the equation of the line that passes through the point (5,-2) and has a slope of -2/5?​
Harman [31]

Answer:

y= -2/5x -2

Step-by-step explanation:

y = mx + b

jxjxjxjxnxjddjdjdjdjj

4 0
3 years ago
A system of equations is graphed on a coordinate plane.
mars1129 [50]
The solution can be found where two lines intersect. The lines in the image do not intersect at an exact point, so we will need to estimate.
The x value is either 1 or -1 from your choices. You can see it is closer to -1 on the horizontal (x axis).
The y value is either 0 or -1 from your choices. You can see it is closer to 0 on the vertical (y axis).
The answer to your set of lines is approximately (-1,0).
5 0
4 years ago
Read 2 more answers
Pleaseeee helppp answer correctly !!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!
solniwko [45]

Answer:

x = 2

Step-by-step explanation:

BO = OD

they are apart of the same line segment with O as the midpoint of BD

since they're equal set equal and solve for x

7x + 4 = 18                      subtract 4 from both sides

7x = 14                            divide both sides by 7

x = 2

7 0
3 years ago
Find the area. Simplify your answer.
irinina [24]

Answer:

2x(x + 3)

<u>2x^2 + 6x</u>

<u></u>

8 0
3 years ago
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