Ask question

Ask question

All categories

2 years ago

12

A group of 5 teachers bought 3 pens and 1 eraser each. Their total cost for all the materials was $12.89. If the eraser was $0.9

7, how much was each pen?
Variable:________________

Equation:________________

Solution:________________

1 answer:

n200080 [17]2 years ago

7 0

Answer:

$0.536

Step-by-step explanation:

<u>Variable: </u>

p for pen

<u>Equation:</u>

5(3p + 0.97) = 12.89

<u>Solution:</u>

5(3p + 0.97) = 12.89
15p + 4.85 = 12.89
15p = 12.89 - 4.85
15p = 8.04
p = 8.04 / 15
p = 0.536

You might be interested in

From a candy machine a random handful of colored chocolate candies are dispensed with 2 quarters. In one turn the machine dispen

Gemiola [76]

Answer:

the answer should be 1/11

Step-by-step explanation:

p(blue first) = 3/12

p(yellow second) = 4/11

so p = 3/12 x 4/11

1/11 is your probability

8 0

1 year ago

Sanjaya is making punch. He uses LaTeX: \frac{1}{3}1 3 c of pineapple juice for every LaTeX: \frac{3}{4}3 4 c of orange juice. H

lord [1]

Answer: $1\dfrac13$ cups of pineapple juice .

Step-by-step explanation:

Equation of direct proportion between x and y:

$\dfrac{x_1}{y_1}=\dfrac{x_2}{y_2}$

As per given,

Let x = quantity of pineapple juice and y = quantity of orange juice.

$x_1=\dfrac13\$ , $y_1=\dfrac34$ , $y_2=3$

Put these values in an equation we get

$\dfrac{\dfrac13}{\dfrac34}=\dfrac{x_2}{3}\\\\\Rightarrow\ \dfrac{4}{9}=\dfrac{x_2}{3}\\\\\Rightarrow\ x_2=3\times\dfrac{4}{9}=\dfrac{4}{3}\\\\\Rightarrow\ x_2=1\dfrac13$

Hence, he needs $1\dfrac13$ cups of pineapple juice .

8 0

3 years ago

What is the area of the Rhombus?

dusya [7]

Answer:

b

Step-by-step explanation:

8 0

3 years ago

after hitting the black friday sales, sarah bought her dress on sale for $35. She saved 45%, what was the original cost.

8090 [49]

The original cost of the dress is $63.64

Step-by-step explanation:

After hitting the black Friday sales

Sarah bought her dress on sale for $35
She saved 45%

We need to find the original cost of the dress

The money that Sarah saved is the value of the discount on the dress

Assume that the price of the dress before the black Friday is 100%

∵ The price of the dress before the black Friday is 100%

∵ She saved 45% when she bought it the black Friday

∴ The price of the dress is decreased by 45%

∵ She bought the dress for $35 ⇒ (after discount)

Let use use the percentage method

→ Before discount : Discount : After discount

→ 100% : 45% : 55% (100 - 45)

→ x : : 35

By using cross multiplication

∵ x × 55% = 35 × 100%

- Divide both sides by 55%

∴ x = 63.64

The original cost of the dress is $63.64

Learn more:

You can learn more about percentage in brainly.com/question/12501490

#LearnwithBrainly

3 0

3 years ago

A Canadian goose migrated at a steady rate of 2 miles every 7 minutes

Gala2k [10]

Answer:

7 min = 2mi

14min = 4mi

21min = 6mi

28min = 8mi

35min = 10mi

Step-by-step explanation:

Let x be the time, and y be the distance

In this case:

x = 2/7y

You can use this formula to answer all of the sections.

Hope this helped.

5 0

2 years ago