Mathematics Middle School

Lorraine writes the equation shown.

x² + y - 15 = 0
She wants to describe the equation using the term relation and the term function.

The equation represents,
A relation and a function
A relation but not function
A function but not a relation
Neither a relation nor a function

Answers

Answer 1
A function is a relation. But a relation is not necessary to be a function. A relation becomes a function if every input just yields an unique output. In this case, we can rewrite the equation as follows.
[tex]y=-x^2+15[/tex]

This equation definitely reflect a relation. In addition, if we plug any x-value in for x, we only get one output for y. So this is also a function.

Thus, the right choice is A. 

Related Questions

Explain how knowing 1+7 helps you find the sum for 7+1

Answers

Same question just was shown in a different way.
Its the same equation but its commutative property
Ex 12+5=5+12

The student store sells pencils that have a markup of 120 percent above their wholesale cost of $0.50 each. They also charge sales tax of 8 percent. What is the total cost of a pencil from the student store?

Answers

$1.19 is right also you probably needed this a week ago but here is the answer. 

Answer:

The total cost of a pencil from the student store is $ 1.188

Step-by-step explanation:

Given,

The original cost or wholesale cost of each pencil = $ 0.50,

Markup percentage = 120 %,

So, the cost of the pencil after markup = 0.50 + 120% of 0.50

[tex]=0.50+\frac{120\times 0.50}{100}[/tex]

[tex]=0.50+\frac{60}{100}[/tex]

[tex]=0.50+0.6[/tex]

[tex]=1.1[/tex]

Now, sales tax = 8 %,

Hence, the final total cost of a pencil = 1.1 + 8 % of 1.1

[tex]=1.1 + \frac{8\times 1.1}{100}[/tex]

[tex]=1.1+\frac{8.8}{100}[/tex]

[tex]=1.1+0.088[/tex]

[tex]=\$1.188[/tex]

How many ounces are in 14 grams?

Answers

0.493835 ounces in 14 grams
1 oz = 28.35 g

14 g * (1 oz)/(28.35 g) = 0.49 oz

14 g = 0.49 oz

Plz help me on that problem number 20

Answers

divide the amount deducted ( $24) by the number of bus rides (12)

24 / 12 = 2

 it cost $2 per ride

Marisa is keeping track of how many miles she runs.after her run on July 12 she had run a total of 7miles if she runs 3miles each day after that what is total numbers of miles she will run after her run on July 18

Answers

Basically the equation is (3x6)+7=25

He Sun bought 3 skirts for s dollars each and a jacket that costs 5 times as much as each skirt. She spent a total of $280. How much did the jacket cost? 1

Answers

The jacket cost 175 dollars.

subtract the quoient of 8 divided by 7 from 9

Answers

8/7=1.143
9-1.143=7.857

seven more than the quotient of a number and 2 is 10

Answers

(x/2)+7=10
More= plus
quotient=division
is=equal

Which expression is the completely factored form of x6−64y3 ? (x2−4y)(x4−16y2) (x2−4y)3 (x2−4y)(x4+4x2y+16y2) (x2+4y)(x4−4x2y+16y2)

Answers

(x^2 - 4y)(x^4 + 4x^2 y + 16y^2)
Answer:

The expression which is obtained on factorising it completely is:

         [tex]x^6-64y^3=(x^2-4y)(x^4+16y^2+4x^2y)[/tex]

Step-by-step explanation:

We are asked to factorize the expression which is given by:

               [tex]x^6-64y^3[/tex]

This expression could also be written as:

[tex]x^6-64y^3=(x^2)^3-(4y)^3[/tex]

Now, we know that:

[tex]a^3-b^3=(a-b)(a^2+b^2+ab)[/tex]

Here we have:

[tex]a=x^2\\\\and\\\\b=4y[/tex]

Hence,

[tex]x^6-64y^3=(x^2-4y)((x^2)^2+(4y)^2+x^2\times 4y)[/tex]

i.e.

[tex]x^6-64y^3=(x^2-4y)(x^4+16y^2+4x^2y)[/tex]

Alex is making 12 pennants for the school fair.The pattern he is using to make the pennants is shown in the figure.The fabricfor the pennants costs $1.25 per square foot. How much will it cost Alex to make 12 pennants?
—
THIS IS URGENT!!!!
PLEASE ANSWER WITH WORK.

Answers

It will cost Alex 15$
so hes making 12 pennants and they cost $1.25 each so you would just mutiply them by each otber which equals $15.00

(04.02 LC)
The graph below shows the numbers of cups of grape juice that are mixed with cups of lemon-lime soda to make servings of grape soda:

A graph is shown. The values on the x-axis are 0, 1, 2, 3, 4, 5. The values on the y-axis are 0, 2, 4, 6, 8, 10. Points are shown on ordered pairs 0, 0 and 1, 2 and 2, 4 and 3, 6 and 4, 8. These points are connected by a line. The label on the x-axis is Lemon lime Soda in cups. The title on the y-axis is Grape Juice in cups.
What is the ratio of the number of cups of grape juice to the number of cups of lemon-lime soda?

Answers

using the points, the x is Soda and the Y is the grape juice

 for (1,2) 1 soda to 2 juices

(2,4) 2 sodas to 4 juices


so the ratio is 2 juices to every 1 soda which is a 2/1 ratio

Answer:

C

Step-by-step explanation:

The distributive property loss of combined subtraction and multiplication for example 3 x (5-2) = (3X5) - (3x2) Explain how you could use the distributive property and mental math to find 5x198

Answers

5 * 198 = 990

(5 * 100) + (5 * 90) + (5 * 8) =
   500 + 450 + 40 =
       990

Movie rental at a video store, you have two options for renting movies. You can pay $4 per movie,or you can pay a one time membership fee of $20 and then pay only $1.50 per movie. After how many movie rentals will she cost of renting movies with the membership be less than the cost of renting movies without the membership?

Answers

The answer is nine movie rentals. 9×1.5+20 equals less than 9×4 which equals 36. I hope that answerd your question ☺️☺️

After 8 movie rentals, will the cost of renting movies with the membership be less than the cost of renting movies without the membership.

What are arithmetic Operations?

The four fundamental operations of arithmetic are addition, subtraction, multiplication, and division of two or even more items.

Included in them is the study of integers, especially the order of operations, which is important for all other areas of mathematics, notably algebra, data management, and geometry.

As per the information given in the question,

There are two options for renting movies.

As per the first option,

Pay $4 per movie, so the equation will be,

y = 4x     (i)

Where y is the total cost and x is the number of movies.

As per the second option,

Take a membership of $20, and they pay $1.50 per movie.

So, the equation will be,

y = 1.5x + $20   (ii)

Where y is the total cost and x is the number of movies.

Now, solve equations (i) and (ii)

4x = 1.5x + $20

4x - 1.5x = 20

2.5x = 20

x = 20/2.5

x = 8

To know more about arithmetic operations:

https://brainly.com/question/25277954

#SPJ2

Explain why you would make one of the addends a tens number when solving an addition problem.

Answers

Addends are numbers used in addition problems, they refers to the numbers that are added together. Addition problems can have two or more addends which can be positive or negative and they can be single digit or double digits.
When solving addition problems, it is advisable to make one of the addends a tens number because, it makes the addition operation easier to manipulate.

Since we can add a number to a tens number easily, we make one of the addends a tens number when solving an addition problem.

Example 1:

Add 9 and 6.

9 + 6 = 9 + (1 + 5)

        = (9 + 1) + 5

        = 10 + 5 = 15

Note that adding 10 and 5 is much easier than adding 9 and 6.

Example 2:

Add 18 and 16.

18 + 16 = 18 + (2 + 14)

        = (18 + 2) + 14

        = 20 + 14 = 34

Note that adding 20 and 14 is much easier than adding 18 and 16.

Which is f(5) for the function –2x2 + 2x – 3? –107 –63 –43 –37

Answers

-2x2+2(5)-3 
-4+10-3
6-3 
3


what are the extra numbers at the end?

A landscaper buys a tree that grows at a rate of 18 inches every 3 months.

How much does it grow in 1 year?

A. 30 in.

B. 36 in.

C. 54 in.

D. 72 in.

A plant grows 9 in. every 2 months.

How will it grow in a year?

A. 18 in.

B. 36 in.

C. 54 in.

D. 108 in.


Answers

1 it grows 18 inches every 3 months

 there are 12 months in 1 year

12 dived by 3 = 4 so there are 4 times it will grow 18 inches

18 * 4 = 72 inches, amount it grows in 1 year

 Answer is D


2. it grows 9 inches every 2 months

 12/2 = 6 times a year it will grow

 9 *6 = 54 inches total for 1 year

 Answer is C

7% percent is what length of 200ft

Answers

Final answer:

To find 7% of 200ft, you multiply 200 by 0.07, resulting in 14ft, which is the length that represents 7% of 200 feet.

Explanation:

The student is asking how to calculate 7% of a 200 foot measurement. To find this, we can multiply 200 feet by 7% (or 0.07) to find the length that represents 7% of 200 feet. The calculation would be:

7% of 200 ft = 0.07 × 200 ft = 14 ft

So, 7% is equal to 14 feet of the 200ft measurement. This type of calculation can be useful for understanding proportions and scales in various applications, including model-making or drawing to scale.

Brandon is shopping at old navy during a sale. All shorts are $16 each and all t-shirts are $10 each. He has $100 to spend and would like to purchase at least 2 pairs of shorts

Answers

what is the question?
If he only wishes to purchase 2 pairs of shorts which will be 16+16=32 then 100-32=68 so he can either get 5 shirts and 1 more pair of shorts and still have 2 dollars left

Approximately how many times greater is 8.5×10^8 than 3.4×10^5

Answers

850000000 /340000 = 2,500 times

Use the picture to answer. Which real number is not both a whole number and an integer? A. 423 B. 259 C. –156D. 0

Answers

um A :)
hope this helps :)))))))))))))

What is 1,120 divided by 35

Answers

1,120 / 35  equals 32


if you multiply 32 by 35 you get 1,120
The answer is 32 because you multiply 35 to get you 1,120 and it’s 32 so,
35 x 32 = 1,120

(x x y)a = xa x ya illustrates which property of eponents

Answers

To raise a product to an exponent, raise each factor to that exponent.

The quotient of 12 and opposite of 3 plus the product of the opposite of 14 and 4

Answers

Ok. Let's break this down.

The quotient of 12 

12/

And the opposite of 3, which would be -3

12/-3

Plus

12/-3 + 

The product of the opposite of 14 (-14)

12/-3 + -14 *

And 4

12/-3 + -14*4

If you want the answer:

-4 + -56

-60

The table shows the types of DVDs customers rented from Sunshine Movie Rentals last year.How many comedy and action movies were rented last year?

Answers

just borrow from the 7 and take the 1 to the 2 and that will make it as 12 so then you subtract 12 - 4 and the answer will be 1,180
the answer is 6720 + 5540= 12260

WILL MARK BRAINLIEST! PLEASE ANSWER IM DESPERATE!

If a scientist has two empty breakers that he needs to fill with a certain chemical a three gallon beaker and a five gallon beaker. How can he measure exactly one gallon of the chemical without wasting any?

Answers

He could use the measurements on the sides of the beakers. Most have them. If there are no measurements, measure it into thirds or fifths. Unless you mean something else
He could pour the 5 gallon breaker into the 2 to be left with 3 gallons. He can pour the 2 gallon one out and pour the 5 gallon one into the 2 gallon one again to be left with 1 gallon.

Hope this helps! :)

Can someone help me with this problem?

Answers

The answer is -1.

First, distribute the negative inside the parenthesis of 1/2.
Next, turn all the denominators into 6 by multiplying by 3 or 2. 

-1/2 + 2/3 + -1 1/6 
Changes to -3/6 + 4/6 - 1 1/6 

-3/6 + 4/6 = 1/6 

1/6 - 1 1/6 = -1


First, simplify the signs:

[tex]= - \frac{1}{2} + \frac{2}{3} - 1\frac{1}{6} [/tex]

Now change the mixed numeral into a fraction:

[tex]= - \frac{1}{2} + \frac{2}{3} - \frac{7}{6} [/tex]

Now change all fractions to the common denominator, 6:

[tex]= - \frac{3}{6} + \frac{4}{6} - \frac{7}{6} [/tex]

Now combine the fractions together:

[tex]=  -\frac{6}{6}

-1

Iodine-125 has a half-life of about 60 days.

How many milligrams of a 500 mg sample will remain after 300 days?

Answers

Since it has a half life of 60 days, this means that every 60 days it multiplies by 0.5. Since it asks for 300 days, your equation is 500*(0.5)^5, which is 15.625 mg left after 300 days.

the answer is 15.625mg

What is 1/6×2/3= to what

Answers

Greetings!

To multiply fractions, we multiply the numerator by the numerator and the denominator by the denominator:

[tex]= \frac{1}{6}* \frac{2}{3} [/tex]
[tex]= \frac{1*2}{6*3}[/tex]
The Answer Is:
[tex]= \frac{2}{18}[/tex]
or
[tex]= \frac{1}{9}[/tex]

Hope this helps.
-Benjamin
The answer to 1/6 times 2/3 would be 2/18 ( simplified to 1/9 )

A mean ogre stole 27 of your muffins. That was 3/5 of all of them! With how many did you start ?

Answers

First divide 27 by 3 to find out how many muffins you had per 1/5

27/3

9

You then multiply this by 5 to figure out how many you had total

9x5

45

You started out with 45 muffins total, that was a mean ogre to steal over half of them!!

Which equation models the situation??

Answers

The answer is option 4. 15% off means the price is 100-15%=85% of the original price.

Answer:

the answer is (b)  4.95a+6.55b=27,95 hope this helped you guys

Step-by-step explanation:

can you guys plz like this question

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