MATHEMATICS MIDDLE SCHOOL

Is y= -4x+3 proportional or non proportional

Answers

Answer 1
Answer:

y= -4x+3 proportional to x. It means the value of y is directly depend on the value of x

How do we know if an equation is proportional or non proportional?

  • A proportional table has a constant of proportionality in that y divided by x always equals the same value.
  • A non-proportional table will have different values when y is divided by x.

example; in the equation y= -4x+3

for different value of x the value of y directly changes.

  • X=1 than y becomes -1.
  • X=2 than y becomes -5.
  • X=-5 than y becomes 23.

The ratio of y/x always gives a constant.

Learn more about proportional or non proportional here: brainly.com/question/175618

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Answer 2
Answer: well, it is proportional

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Multistep Sandy charges each family that she babysits a flat fee of $10 for the night and an extra $5 per child.kimmi charges$ 25 per night no matter how many children a family has write a two step equation compared the girls also is the fees are the same how many children they should have to charge same amount

Answers

We know Kimmi charges a flat rate of 25 so we do 25-10 to get 15 so if sandy baby sat 3 kids there price would be the same

Answer:P = 3

Step-by-step explanation:

25 = 10 + 5p

25-10 = 15 ; 10-10 = 0

15 = 5p ; 15 / 5 = 3

Therefore, p = 3

Other ways to express 10^4

Answers

Answer:

one way is 10000

Step-by-step explanation:

Covert 1 4/7 into a decimal and show/explain how you got your answer

Answers

Answer:

4/10 im smart im a teacher

Step-by-step explanation:

~~~ 20 POINTS ~~~Country Carpets charges $22 per square yard for carpeting, and an additional installation for $100. City Carpets charges $25 per square yard for the same carpeting, and an additional installation fee of $70.

a. Write and solve an equation to find the number of square yards of carpeting for which the total cost charged by the two companies will be the same.

b. Mr. Shu wants to hire one of the two carpet companies to install carpeting in his basement. Is he more likely to hire Country Carpets or City Carpets? Explain your reasoning.

Answers

A) Lets write our equations.

22x + 100 = 25x + 70

Now lets solve step-by-step.

Apply the inverse operation            22x + 100 = 25x + 70
                                                       -22x             -22x

25x - 22x = 3x

3x + 70 = 100
       -70     - 70               We subtract 70 from both sides because (inverse                                                                                                                  operation)

3x = 30

3x/3 = 30/3
x = 30/3
x= 10

B) We need to find which one is the most cheap.

Lets pick an integer to replace x.

22x + 100 = 25x + 70

Lets choose '2'

22(2) + 100 = 25(2) + 70
44 + 100
 50 + 70

144
120

The first one : Country Carpets charges $144 , while at the same rate, City carpets charges 120.

So, obviously, City Carpets is cheaper than that other one, so he would most likely choose that one.  
a.
Let x be the number of square yards of carpeting for which the total cost charged by the two companies will be the same.

We have an expression for the total cost of Country Carpets:
($22/ 1 yd^2)* (x yd^2) + $100
= $22*x+ $100
or 22x+ 100

We also have another expression for the total cost of City Carpets:
($25/ 1 yd^2)* (x yd^2)+ $70
= $25*x+ $70
or 25x+ 70

Now set the two expressions to be equal:
22x+ 100= 25x+ 70
⇒ 100- 70= 25x -22x
⇒ 30= 3x
⇒ 30/3= x
⇒ 10= x

The final answer for a is 10 square yards of carpeting~

b.
Let's assume that Mr. Shu wants to install carpeting for 1 square yard.

Country Carpets: $22*1+ $100= $122
City Carpets: $25*1+ $70= $95

Therefore, Mr. Shu will be likely to choose City Carpets if he wants to install carpeting for 1 square yard.

Now let's try x=11 (square yard):
Country Carpets= $22*11+ $100= $342
City Carpets= $25*11+ $70= $345

Therefore, Mr. Shu will be likely to choose Country Carpets if he wants to install carpeting for 11 square yard.

If you paid really close attention, you would notice that the price of City Carpets will be cheaper than the other when x is >0 and <10. At x=10, the price is equal. When x is >10, the price of Country Carpets will be cheaper than the other one.

So it depends:
If x were >0 and <10, Mr. Shu would be likely to choose City Carpets.
If x were 10, Mr. Shu could choose either Country Carpets or City Carpets.
If x were > 10, Mr. Shu would be likely to choose Country Carpets.

Hope this helps~

Liam has 9/10 gallon of paint for painting the bird houses he sells at the craft fair. Each bird house requires 1/20 gallon of paint. How many birdhouse a can Liam paint?

Answers

Liam can paint 18 bird houses.

HELP ME! I'm confused if to whether I should choose a or b

Answers


' B ' says that he starts with $50,000and then loses $100 for each computer he sells.

If he sold 500computers with that equation, his total income would be zero.

The only way he could earn$75,000 from that equation would be to sell
(negative 250) computers.That would be quite a trick, so it's most likely not 'B'.
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