All categories

3 years ago

The cost of one pencil is $3, and the total cost of three pencils is $9. Which of the following is true?

Mathematics

2 answers:

brilliants [131]3 years ago

4 0

Answer:

Step-by-step explanation:

podryga [215]3 years ago

3 0

The number of pencils and total cost are in a proportional relationship because the cost increases with the number of pencils.

Option D is correct.

Step-by-step explanation:

The cost of One Pencil = $3

The cost of 3 Pencils = $9

So, as the number of pencils are increasing, the total cost of pencils is also increasing because cost of 1 pencil is $3 and cost of 3 pencils increases to $9

So, we can say that the number of pencils and total cost are in a proportional relationship because the cost increases with the number of pencils.

Option D is correct.

Keywords: Proportional relationship

Learn more about proportional relationship at:

#learnwithBrainly

You might be interested in

Solve the equation. 8 (2-6v) +19=-61

irinina [24]

Answer:

v=2

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Shauna purchased a book about origami.The book cost $19.00 and 7% sales tac was added.Shauna gave the cashier $25.00 in cash.How

OLEGan [10]

Answer:

$4.67

Step-by-step explanation:

First, add the price with the sales tax:

19(1.07)

= 20.33

To find how much she got back in change, subtract 20.33 from 25

25 - 20.33

= 4.67

So, she got $4.67 in change

4 0

3 years ago

Do you know the answer? Help me!

nataly862011 [7]

A. 8

QRP
QPT
TPS
TRS
SPR
STP
QTS
QRS

3 0

3 years ago

Read 2 more answers

Find the length of AC Use that length to find the length of

Gekata [30.6K]

Answer:

1. AC = 5 cm

2. CD = 10.7 cm

Step-by-step explanation:

Looking at the left triangle, we see that AC is the side "opposite" of the angle given and AB is the "hypotenuse".

Which trigonometric ratio relates "opposite" to "hypotenuse"?

Yes, that's SINE.

So we can write:

$Sin(30)=\frac{AC}{10}\\AC=10*Sin(30)$

We know from 30-60-90 triangle, Sin(30) = 0.5, so we have:

$AC=10*Sin(30)\\AC=10*0.5\\AC=5$

Thus,

AC = 5 cm

Now, looking at right side triangle, we know AC, side "opposite" and we want to find CD, side "adjacent". Which trig ratio relates these 2 sides?

Yes, that's tan!

Thus we can write:

$Tan(25)=\frac{5}{CD}\\CD=\frac{5}{Tan(25)}$

Now using calculator, we get our answer to be:

CD = $\frac{5}{Tan(25)}=10.7$

CD = 10.7 cm

8 0

3 years ago

The cost of one pound of peanuts is 60% of the cost of one pound of cashews. if one pound of cashews cost 2$, what is cost of on

Dafna11 [192]

Hello!

In order to find the cost of one pound of peanuts, we need to find 60% of two dollars. To do that, we convert 60% to a decimal, then multiply that to the cost of cashews, which is two dollars.

60 / 100 = 0.60

0.60 x $2.00 = $1.20

Therefore, the cost of one pound of peanuts is $1.20.

The cost of two pounds of peanuts can be found by multiply the cost of one pound of peanuts by two. Then, we add the cost of one pound of cashews, which is two dollars.

$1.20 · 2 = $2.40

$2.40 + $2.00 = $4.40

Therefore, the total cost of two pounds of peanuts and one pound of cashews is $4.40.

Question 1: $1.20

Question 2: $4.40

4 0

4 years ago