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worty [1.4K]
3 years ago
7

Each deli sandwich made uses 3/8 pound of roast beef. Marisa started with 5 pounds of roast beef and now has 2 3/4 pounds left.

How many deli sandwiches did she make ?

Mathematics
2 answers:
puteri [66]3 years ago
6 0
Yo subtract 5- 2.75 and you get 2.25. 2.25 divided by .375 is 6 so 6 deli sandwiches were made
Naily [24]3 years ago
3 0

Answer: Ok, each sandwich needs 3/8 pounds of roast beef. We also know that Marisa started with 5 pounds and now she has 2 3/4 (or 2.75 pounds).

First we need to see how much roast beef she used, this is the difference between the amount that she had at the start and the amount that she had at te end.

5 - 2.75 = 2.25 pounds

So she used 2.25 pounds.

And we also know that each sandwich needs 3/8, then we need to divide the amount she used for the amount needed for one sandwich, and the result is the amount of sandwiches created.

(2.25)/(3/8) = 6

So she 6 sandwiches were created.

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For a certain bathtub, the hot water faucet can fill the tub in 12 minutes. The cold water faucet can fill the tub in 8 minutes.
Fofino [41]

If both faucets are used together, it time taken by them to fill the tub is 4.8 minutes.

<h3>What is the concept of time and work?</h3>

Time and work share a fundamental idea in common with other arithmetic topics, namely the idea of proportionality.

When the amount of work is constant, efficiency is inversely proportional to the length of time required.

Important Time and Work Formula:

  • Work Done = Time Taken × Rate of Work.
  • Rate of Work = 1 / Time Taken.
  • Time Taken = 1 / Rate of Work.
  • If a piece of work is done in x number of days, then the work done in one day = 1/x.
  • Total Wok Done = Number of Days × Efficiency.
  • Efficiency and Time are inversely proportional to each other.

Calculation for the time taken by both faucet to fill the tub.

The unit should be tub per minute.

Then, do the reciprocal of the result to have minute per tub.

The hot water faucet can fill the tub in 12 minutes.

The cold water faucet can fill the tub in 8 minutes.

The filling rate for both faucets filling the tub at the same time is the sum of their rates.

Let 't' be the time taken by both faucets.

Then,

\frac{1}{12} +\frac{1}{8} =\frac{1}{t}

\frac{8+12}{8*12} =\frac{1}{t}

\frac{1}{t} =\frac{20}{96}

\frac{t}{1} =\frac{96}{20}

t = 4.8

Therefore, the time taken by both faucets to fill the tub is 4.8 minutes.

To know more about the formula for calculating power, here

brainly.com/question/20290932

#SPJ4

3 0
2 years ago
Shiloh is 7 years older than Courtney. Shiloh's age is 13 years less than two times Courtney's age. The system below models the
klasskru [66]
The answer is, "<span>B. Solve c + 7 = 2c − 13 to find the value of c."

Hoped I helped!

</span>
5 0
3 years ago
Read 2 more answers
Solve the inequality 5y+4 ≤ 22-y and graph the solution set on a number line. Please explain how to do it!
gtnhenbr [62]

Answer:

y≤3

Step-by-step explanation:

5y+4≤22−y

<em>Step 1: Simplify both sides of the inequality.</em>

5y+4≤−y+22

<em>Step 2: Add y to both sides.</em>

5y+4+y≤−y+22+y

6y+4≤22

<em>Step 3: Subtract 4 from both sides.</em>

6y+4−4≤22−4

6y≤18

<em>Step 4: Divide both sides by 6.</em>

6y/6≤18/6

y≤3

4 0
2 years ago
Read 2 more answers
7th grade girl!<br><br> *(urgent, please help! )*
GenaCL600 [577]

For all the angles, you will have to solve for x

A: 162 = 3x

162/3 = x

54 = x

M: 120 + 2x = 180

2x = 180 - 120

2x = 60

x = 60/2

x = 30

W: 150 = 30x

150/30 = x

5 = x

S: 20 + 2x = 90

2x = 90 - 20

x = 70/2

x = 35

Q : 45 + 5x = 90

5x = 90 - 45

x = 45/5

x = 9

P: not too sure if its 150,

150 + (x+5) = 180

x+5 = 180- 150

x = 30 - 5

x = 25

now you will put all the x values in order. ( i think thats what you supposed to do)

it will be: 5, 9, 25, 30, 35, 54

hope this helps♡♡♡

7 0
3 years ago
Can you help me out please
borishaifa [10]
Picture on the left: y = 1/2x + 3

Picture on the right: y = -2x - 3

Mark me as brainliest please?
7 0
3 years ago
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