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Sonbull [250]
3 years ago
5

WILL GIVE BRAINLIEST!!!!!!! A boy had 20 cents. He bought x pencils for 3 cents each. If y equals the number of pennies left, wr

ite an equation showing the dependence of y on x. What is the domain of the function?But it says that x is a whole number for the domain. PLS HELP.
Mathematics
1 answer:
kumpel [21]3 years ago
5 0

Answer:

Hey there!!

The total number of cents - 20

Cost for each pencil - 3 cents

Number of pencils bought - ' x '

y = number of pennies left

What is the domain ?

Show how y is dependent on x ..

Let's get this into an equation :

... The total cost for x pencils bought = 3x

... Number of pennies left = 20 - 3x

... y = number of pennies left

... y = 20 - 3x

Notice : If the x value changes, the y value changes too

... If x = 1 , then , y = 17; If x = 2 , then , y = 14

Hence, we could say y is dependent upon x

Domain = ?

... Remember - The total number of pennies = 20 ; hence, the total cost cannot go above 20 cents.

Hence, we will have to work with inequalities

The equation :

... 20 ≥ 3x

Divide 3 on both sides

20 / 3 ≥ x

x ≥ 6.667

Let's take this as 6

Hence , the domain will be :

D : { 1 , 2 , 3 , 4 , 5 , 6 }

Hope my answer helps!

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So graph the point (0,15)

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so you always do rise over run for slope.

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3 years ago
-x+20=31 solve for x
olga_2 [115]

Answer:

-x+20=31

Step 1: Subtract 20 from both sides.

−x+20−20=31−20

−x=11

Step 2: Divide both sides by -1.

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=

11

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x=−11

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I WILL MARK AS BRAINLIEST!!! What is the value of x?<br><br> 8x+3=43
uysha [10]
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8 0
3 years ago
Price-club sells a 12-ounce package of spaghetti noodles for $3.44 and Shop Mart sells a 2-pound box of spaghetti noodles for $8
Eva8 [605]

The unit price per ounce at Price club is $0.29 and the unit price per ounce at Shop Mart is $0.26

Step-by-step explanation:

Price of 12 ounce package at Price Club = $3.44

Unit rate per ounce = \frac{Price\ of\ package}{Weight\ of\ package}

Unit rate per ounce = \frac{3.44}{12} = \$0.29

Price of 2 pound box at Shop Mart= $8.35

1 pound = 16 ounce

2 pound = 16*2 = 32 ounces

Unit rate per ounce = \frac{Price\ of\ package}{Weight\ of\ package}

Unit rate per ounce = \frac{8.35}{32} = \$0.26

The unit price per ounce at Price club is $0.29 and the unit price per ounce at Shop Mart is $0.26

Keywords: unit rate, division

Learn more about division at:

  • brainly.com/question/4401748
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#LearnwithBrainly

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