1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Semenov [28]
4 years ago
13

Doctor florens needs 25 g of salt for each student to do an experiment she has 1.2 kg of salt on hand she has a total of a 128 s

tudents how much more salt does she need?
Mathematics
1 answer:
erik [133]4 years ago
5 0
The first thing I would do is convert that 1.2 kilograms of salt to grams; that would ensure that all the units are the same so we can perform calculations on them.

1.2kg = 1200g


Next, I would find out how many students can do the experiment with 1200g of salt, by finding it how many 25g are in 1200g (by dividing them).

\frac{1200g}{25g}=48students


That means we still have 80 students left to provide salt for (128 - 48).
Therefore, he needs an additional 80 amounts of 25g of salt.

Therefore he needs:
80students*25g = 2000g = 2kg
You might be interested in
At Elisa's printing company llc there are two kinds of printing presses: model a which can print 70 books per day and model b wh
Vilka [71]
70a + 55b = 905
a + b = 14
55a + 55b = 770

(70a-55a) + (55b-55b) = 905 - 770
15a = 135
a = 9

a + b = 14
9 + b = 14
b = 5
7 0
3 years ago
At the coffee shop, two coffees and one latte cost $10.50. Three coffees and two lattes cost $17.00. What is the cost of one cof
EastWind [94]

To solve this problem, we can set two equations.

Let x be the cost of coffee and y be the cost of latte.

Two coffees and one latte: 2x + y = 10.50

y=10.50 - 2x ...(1)

Three coffees and two lattes: 3x + 2y = 17.00...(2)

Put (1) into (2), we have:

3x + 2(10.50-2x) = 17.00

3x + 2(10.50) - 2(2x) = 17.00

3x + 21 - 4x = 17

Put the unknown to one side:

3x -4x = 17 - 21

-x = -4

When there are negative numbers on both sides, we can take the negative signs away:

x= 4

Therefore, cost of one coffee is A. $4.00.

Hope ot helps!

3 0
4 years ago
Kendrick’s bill for lunch was $24.50. He left the server an 18% tip. What is the total amount that Kendrick paid for lunch inclu
Mice21 [21]

Answer:

$28.91

Step-by-step explanation:

The first step is to calculate the amount of the tip. You multiply the price (24.50) by the tip amount (18% or 0.18). The product is 4.41. Then, you add the tip to the bill. 24.50+4.41=28.91.

7 0
3 years ago
What is the answer to the system?​
omeli [17]

\begin{cases}x + y  = 40 \\  \frac{x}{20} +  \frac{y}{4}   = 6\end{cases} \\ \Leftrightarrow \begin{cases} x + y = 40\\x + 5y = 120 \end{cases} \\ \Leftrightarrow \begin{cases} x + y = 40\\ 4y = 80\end{cases} \\ \Leftrightarrow \begin{cases}x  = 20 \\ y = 20\end{cases}

6 0
4 years ago
What is 3.2 m converted to centimeters?
Allushta [10]
3.2 m converted to centimeters is 320. So meters converted to centimeters is multiplied by 100. Ex.) 10m converted to centimeter is 1000.
Hope this helped :3
4 0
3 years ago
Other questions:
  • The point at which a company's costs equal its revenues is the break-even point. C represents the cost, in dollars, of x units o
    12·1 answer
  • Hurricane Katrina in 2005 dumped 6.5 trillion gallons of water on land. If the 6.5 trillion gallons of water were a
    5·1 answer
  • PLEASE HELP ME ASAP !!!!
    11·1 answer
  • Which one(s)?? Hurry!!!
    11·2 answers
  • Which graphs are inverses of one another?
    13·2 answers
  • Your school’s baseball team sells 1250 raffle tickets at $4 each. The grand prize is a $3000 boat. The second prize is a $450 gr
    12·1 answer
  • Rotate the axes to eliminate the xy-term in the equation. Then write the equation in standard form.
    15·1 answer
  • Find the x- and y intercepts for each of the following
    6·1 answer
  • Please help me I really need asap
    12·2 answers
  • Combine the radicals 4√7+3√28.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!