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3 years ago

Determine the function’s value when x = -1

Mathematics

2 answers:

devlian [24]3 years ago

5 0

It is B because -1 divided by 0 is -1

gayaneshka [121]3 years ago

3 0

Step-by-step explanation:

its b because if u listen in math class u would no nooooooob

You might be interested in

the surface area of a rectangular prism is 190 square inches the length is 10 inches and the width is three inches find the heig

Nastasia [14]

Answer:

h=5in

Step-by-step explanation:

The following areas are equal:

1. Front and Back.

2. Left and right.

3. Top and Bottom.

Therefore, we calculate 3 areas and

multiply each by 2 to get the 6 areas:

As=2(3*h) + 2(10*h) + 2(10*3)=1901n^2.

6h + 20h + 60 = 190,

26h = 190 - 60 = 130,

h = 5in.

7 0

3 years ago

I don’t understand this.. <br> will someone please help? Will mark Brainliest along with 20 points.

inn [45]

To say two quantities $a$ and $b$ "vary directly" with one another means that a change in one of the quantities results in a proportional change in the other quantity. For example, if $a=2b$ , then $b$ is proportional to $a$ by a factor of 2, or $a$ is proportional to $b$ by a factor of 1/2. In other words, if you change $b$ by some fixed amount, then $a$ changes by double that amount.

Mathematically this means there is some constant scaling factor $k$ such that $a=kb$ . In question 4, we're told $f(x)$ varies directly with $x^2$ , which means there's some $k$ such that

$f(x)=kx^2$

We're given that $f(x)=40$ when $x=2$ , so

$40=k\cdot2^2\implies40=4k\implies k=10$

Then when $x=5$ , we get

$f(5)=10\cdot5^2=10\cdot25=250$

- - -

For $a,b$ to "vary inversely" with one another means that a change in one quantity results in an "opposite" change in the other. In other words, if $a$ increases, then $b$ decreases, and vice versa.

Mathematically, this is the same as saying there is some fixed number $k$ such that $ab=k$ .

For example, if $k=1$ and we start with $a=1$ , then $b=1$ also. If we change to $a=2$ , then $b=\dfrac12$ ; if $a=10$ , then $b=\dfrac1{10}$ , and so on.

In question 5, we're told $f(x)$ varies inversely with $x$ , so that there is some constant $k$ for which

$x\,f(x)=k$

When $x=4$ , we have $f(x)=6$ :

$4\cdot6=k\implies k=24$

Then for $x=8$ , we get

$8\,f(8)=24\implies f(8)=3$

5 0

3 years ago

Which of the graphs best represents a system of equations that has no solution?

Setler [38]

Can u add a picture of the graphs I can’t tell what the answer is if I don’t have the graph

3 0

3 years ago

Read 2 more answers

Triangle XYZ is isosceles. Angle Y measures a°. What expression represents the measure of angle X?

lara [203]

The isosceles triangle has two sides congruent which mean they are equal. If two sides are equal, it also means that two angles are equal.

For triangle XYZ, we have angles shown below:
∠X + ∠Y + ∠Z = 180°

If ∠Y = a°, then we can have the expression for ∠X such as shown below:
∠X + a° + ∠Z =180°
∠X= 180° - a° - ∠Z

If ∠Z = ∠Y, then we have the final expression:
∠X = 180° -2a°

4 0

3 years ago

A manufacturer makes ball bearings out of motel steel. it takes 5.24 cubic centimeters of molten steel to make ball bearings tha

katrin2010 [14]

Using volume of ball bearings, a manufacturer makes 10 ball bearings from 5.2 cm³ of molten steel to make ball bearings that each have a diameter of 1 centimeter.

According to the question,

It takes 5.24 cubic centimeters of molten steel to make ball bearings that each have a diameter of 1 centimeter.

Radius = 1/2 = 0.5 cm

volume V of one ball bearing is: V=(4/3)*π*r³

= 4/3 * π * (0.5)³

=0.524 cm³

In order to find number of ball bearings out of molten steel only if we divide the volume of steel by the volume of the ball bearing

5.24/0.524=10.

Hence, using volume of ball bearings, a manufacturer makes 10 ball bearings from 5.2 cm³ of molten steel to make ball bearings that each have a diameter of 1 centimeter.

Learn more about volume here

brainly.com/question/23270880

#SPJ4

4 0

2 years ago