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abruzzese [7]
3 years ago
5

Aron wrote the function f(x)=25x-15 find the amount of money he would make after washing x cars. Select all that are in the doma

in of Aron’s function.
A-2
B-2.3
C-5
D-7.1
E-10
Mathematics
1 answer:
My name is Ann [436]3 years ago
4 0

Answer:

A. 2


C. 5


E. 10

Step-by-step explanation:

If x represents the number of cars that wash Aron then the domain of x must contain only the whole and positive numbers (natural numbers)


This, because Aron can not wash -4 cars, it would be absurd then that x was a negative number.


In the same way Aron can not wash 1.57 cars. Or washed 1 car or washed 2, it is not consistent in this case to say that washed a car and a half, for example.


Therefore the correct answer is the options


A. 2


C. 5


E. 10

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What is <br> 2x-3y=-19<br> 4x+3y=7<br> URGENT
IRINA_888 [86]

Solve by elimination.

 2x-3y=-19

+(4x+3y=7)

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

6x=-12

x=-2

2(-2)-3y=-19

-3y=-15

y=5

Intersection Point: (-2,5)

3 0
3 years ago
In the given figure, find the value of x.​
Dafna1 [17]

Answer:

  11.  x = 8

  12.  x = 15

  13.  x = 9

Step-by-step explanation:

This statement of the applicable relation is perhaps a little different than the one(s) you may have seen: From the point where the segments meet, the product of the length of segment to one side of the circle and the length of segment to the other side of the circle is the same for both segments. When the segment is tangent to the circle, those two circle intersection points are the same point.

This rule is applicable for all of these problems. Once the relation is written, the equation can be divided by the coefficient of x to find the value of x.

__

<h3>11.</h3>

  12·4 = 6x

  x = 48/6 = 8

__

<h3>12.</h3>

  x·x = 9·(16+9)

  x = √(9·25) = 15 . . . . take the square root

__

<h3>13.</h3>

  x·16 = 8·(8+10)

  x = 144/16 = 9

4 0
2 years ago
The volume of a rectangular prism is b3 + 8b2 + 19b + 12 cubic units, and its height is b + 3 units. The area of the base of the
omeli [17]
Given:

The volume of the rectangular prism is 

b^{3}+8 b^{2} +19b+12,

the height is h=(b+3)

1. The volume of a rectangular prism is (base area)*height

also, notice that the volume is a third degree polynomial, the height is a 1st degree polynomial, so the base area must be a 2nd degree polynomial, whose coefficients we don't know yet.
Let this quadratic polynomial be (mb^{2}+nb+k)

 
2

b^{3}+8 b^{2} +19b+12=(mb^{2}+nb+k)*(b+3)


notice that  b^{3} is the product of the largest 2 terms: mb^{2} and b, so m must be 1

also, notice that 12 is the product of the constants, k and 3

so k*3=12, this means k=4

3
we write the above equality again:

b^{3}+8 b^{2} +19b+12=(b^{2}+nb+4)*(b+3)


(b^{2}+nb+4)(b+3)= b^{3}+3 b^{2} +nb^{2}+3nb+4b+12

== b^{3}+(n+3)b^{2}+(3n+4)b+12


4
now compare the coefficient with the left side:

8 b^{2}=(n+3)b^{2}

8=n+3

n=5


substituting n=5: 

the base area is b^{2}+5b+4

Answer: b^{2}+5b+4


3 0
3 years ago
Evaluate the expression when x=10, y=−2, and z=−5.
Vlad [161]

\frac{ -  {x}^{2} + 6z }{y}

if x=10 y=-2 and z=-5 then...

\frac{ { - 10}^{2}  + 6 \times  - 5}{ - 2}

we solve this to get...

<em>65</em>

therefore the answer to your question would be 65

hope this helped-have a good day bro cya)

8 0
2 years ago
Someone please help me in math
Helga [31]
I just solved it and I'm pretty sure its only one solution, I took the bottom equation multiplied it by -3 then i canceled out the equations and got 9. So that would make it C.
3 0
3 years ago
Read 2 more answers
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