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Svetradugi [14.3K]
3 years ago
15

Which out of these 2 "graphs" represent a proportional relationship? PLEASE HELP

Mathematics
2 answers:
-BARSIC- [3]3 years ago
8 0
The bottom one since as x increases so does y. the top function doesn't since it's a quadratic. meaning it decreases and hen increases
Snezhnost [94]3 years ago
7 0
I believe the second option, (-2.2)-(3,7), is proportional because it increases up one over one everytime if you draw it. 
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An equilateral triangle has a perimeter of 15x +3. what is the length of each side of the triangle?
xxTIMURxx [149]
The length of each side is 5x + 1
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3 years ago
Question 5 of 10
musickatia [10]

Answer:

25 in ^2

Step-by-step explanation:

First find the area of the circle

A = pi r^2

A = 3.14 ( 4.3)^2

A =58.0586

The take the fraction of the circle that is shaded

A circle is 360 degrees

155/360

155 /360 * the  total area = area shaded

31/72 * 58.0586 = 24.99745278 in ^2

Rounding yields 25 in ^2

4 0
3 years ago
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If you have $2500 how many board feet can you buy if the cost per board foot is $3.21?
dexar [7]

Answer:

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6 0
2 years ago
The heights of women aged 20 to 29 are approximately normal with mean 64 inches and standard deviation 2.7 inches. men the same
Artyom0805 [142]
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5 0
2 years ago
Someone please help me with these 2 problems :(
k0ka [10]
If the discriminant b^2-4ac is 0, then you have TWO EQUAL, REAL ROOTS.

If you're given the x-intercepts, you can determine the factors of the polynomial as follows:   Take -3, change the sign and write (x+3).  Take 5, change the sign and write (x-5).  Then the eq'n of the parabola is

f(x) = (x+3)(x-5) = x^2 - 2x -15, in which a=1, b = -2 and c= -15.

You can find the x-coordinate of the vertex, which is also the equation of the axis of symmetry, using

x= -b / (2a).    Here, x = -(-2) / (2[1]), or  x = 1

Find the y-coordinate by subbing 1 for x in the equation above:

y = (1)^2 - 2(1) - 15  =  1 - 2 - 15  =  -16

The vertex is at (1, -16) and the equation of the axis of symm. is x = 1.
7 0
3 years ago
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