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Montano1993 [528]
2 years ago
10

Which set of ordered pairs represents a function?

Mathematics
2 answers:
GaryK [48]2 years ago
6 0
D (not 100% sure) if there are multiple of the same x then it's not a function. In both sets they don't have any repeating x's please don't not rely on this answer cause I am not positive that is correct
vovangra [49]2 years ago
4 0
B. is the answer I believe since most are not functions
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|3x-11|=x+3<br> Write both solutions as equations on the same line separated by a comma.
Akimi4 [234]

Answer:

x = 2, x = 7

Step-by-step explanation:

Given

| 3x - 11 | = x + 3

The absolute value always gives a positive value, however, the expression inside the bars can be positive or negative, thus

3x - 11 = x + 3 or - (3x - 11) = x + 3

Solving both equations

3x - 11 = x + 3 ( subtract x from both sides )

2x - 11 = 3 ( add 11 to both sides )

2x = 14 ( divide both sides by 2 )

x = 7

or

- (3x - 11) = x + 3

- 3x + 11 = x + 3 ( subtract x from both sides )

- 4x + 11 = 3 ( subtract 11 from both sides )

- 4x = - 8 ( divide both sides by - 4 )

x = 2

As a check

Substitute these values into the equation and if both sides are equal then they are the solutions

x = 7

| 3(7) - 11 | = | 21 - 11 | = | 10 | = 10

right side = 7 + 3 = 10 → both sides are equal thus x = 7 is a solution

x = 2

| 3(2) - 11 | = | 6 - 11 | = | - 5 | = 5

right side = 2 + 3 = 5 → both sides are equal thus x = 2 is a solution

The solutions are x = 2, x = 7

8 0
3 years ago
What does the equation 0=-5n-2n equal n?
Umnica [9.8K]
-5n -2n = 0
combine like terms
-7n = 0
divide by -7
n = 0
6 0
3 years ago
4c - 3, when c = -2 ///
Whitepunk [10]
4(-2)-3
=-8-3
=-11
c=-11
7 0
2 years ago
Determine the equation of each of the following parabolas
nata0808 [166]

Try this solution with a short explanation:

a) y=ax²+5; ⇒ substitution (4;0): 16a+5=0; ⇒ a= -5/16.

Answer: <u>y= -5/16 x²+5</u>;

b)<u> y=x²</u>;

c) y=ax(x+7); ⇒ substitution (4;4): 4a(4+7)=4; ⇒a=1/11.

Answer: <u>y= 1/11 x²+ 7/11 x</u>;

d) y=a(x-1)(x-3); ⇒substitution (0;3): (-1)*(-3)*a=3; ⇒a=1.

Answer: <u>y=x²-4x+3</u>;

e) y=a(x-1)(x+3); ⇒ substitution (-1;5): (-2)*2*a=5; ⇒ a= -5/4.

Answer: <u>y= -5/4 x² -5/2 x +15/4</u>;

f) y=ax²+bx+c; ⇒ substitution (2;2): 4a+2b+6=2 or 2a+b= -2 (the I-st equation of the system);

the x-coordinate of the vertex: -b/2a=2; ⇒ b= -4a (the II-d equation of the system);

\left \{ {{2a+b=-2} \atop {b=-4a}} \right. \ => \ \left \{ {{a=1} \atop {b=-4}} \right.

Answer: <u>y=x²-4x+6.</u>

4 0
3 years ago
What is the surface area of the rectangular pyramid below?
mezya [45]

Answer:

  A.  675 units²

Step-by-step explanation:

The formula for the surface area of a square pyramid is ...

  A = s(s +2h)

where s is the side length of the base, and h is the slant height of a face.

__

<h3>use the formula</h3>

The given pyramid has s=15 and h=15, so the surface area is ...

  A = (15)(15 +2×15) = 15(45) = 675 . . . square units

3 0
2 years ago
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