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Pavlova-9 [17]
3 years ago
11

Which of the following is a function?

Mathematics
2 answers:
Marianna [84]3 years ago
8 0
The expression b. {(-4,1),(1,8),(-4,-2)} is a function
otez555 [7]3 years ago
7 0

Answer:

b.

Step-by-step explanation:

The expression b is a function because the x values are all different.

In fact it is a one-to-one function as there is a different value of y for each value of x.

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Your bill is $35.50. What is your total<br> after you leave a 20% tip and pay 5%<br> tax?
lys-0071 [83]
I think this is right 26.98


35.50-20%-5% =26.98

Sorry if I’m wrong
6 0
4 years ago
What is the recursive formula for the geometric sequence: 96, 72, 54, 40.5?
shutvik [7]
R = 3/4
term 1 = 96

*Note that all An are (a subscript n) and A(n-1) are (a subscript n-1).*

An = A(n-1)*r
6 0
4 years ago
Read 2 more answers
Solve the system using substitution. <br><br> 2x + 2y = 30<br> y - 4x = 0<br><br> ( _ , _ )
Kay [80]

Answer:

x = 3

y= 12

Step-by-step explanation:

2x + 2y = 30

y - 4x = 0  /*2

2x + 2y = 30

2y - 8x = 0

-----------------

10x = 30

x = 3

y= 12

7 0
3 years ago
Read 2 more answers
Katie owns a pretzel stand. Her profit, in dollars, is given by the function , where is the number of pretzels sold. What is the
olga nikolaevna [1]

Using the vertex of the quadratic equation, it is found that the maximum profit she can earn is of $106.

<h3>What is the vertex of a quadratic equation?</h3>

A quadratic equation is modeled by:

y = ax^2 + bx + c

The vertex is given by:

(x_v, y_v)

In which:

x_v = -\frac{b}{2a}

y_v = -\frac{b^2 - 4ac}{4a}

Considering the coefficient a, we have that:

  • If a < 0, the vertex is a maximum point.
  • If a > 0, the vertex is a minimum point.

In this problem, her profit is modeled by:

P(x) = -x^2 + 14x + 57

Which is a quadratic equation with coefficients a = -1, b = 14, c = 57, hence, her maximum profit in dollars is given by:

y_v = -\frac{14^2 - 4(-1)(57)}{4(-1)} = 106

More can be learned about the vertex of a quadratic equation at brainly.com/question/24737967

8 0
2 years ago
What the property says that 5+13=13+5 <br> Associative property or commutative property
Maurinko [17]
It is commutative property.
5 0
2 years ago
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