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
SVETLANKA909090 [29]
3 years ago
11

A scientist mixes water (containing no salt) with a solution that contains 30% salt. She wants to obtain 180 ounces of a mixture

that is 15% salt. How many ounces of water and how many ounces of the 30% salt solution should she use?
Mathematics
1 answer:
xxMikexx [17]3 years ago
5 0

Answer:

water : 90 ounces

salt solution: 90 ounces

Step-by-step explanation:

Call w the amount of water and call the solution containing 30% salt.

We want to get 180 ounces of a mixture with 15% salt.

So:

The amount of mixture will be:

w + s = 180

the amount of salt will be

0w + 0.3s = 180 * 0.15

0.3s = 27

s = 90\ ounces

Now we substitute the value of s in the first equation and solve for w

w + 90 = 180

w = 90\ ounces

You might be interested in
(4+2-2)(2)-5<br> -3<br> 2.<br> 3
puteri [66]
The answer is -4 because 4+2 is equal to 6 and then 6-2 is equal to 4 and then times into the number of 2 the answer is 4x2 is equal to 8 and then minus into the negative 5 an the answer is -4.
5 0
3 years ago
Read 2 more answers
The annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country durin
Vladimir [108]
F=5.77X10^9(1.032^(y-1985)), we want to know when this is:

2.2X10^12=5.77X10^9(1.032^(y-1985))

381.2825=1.032^(y-1985)

ln(3,812825)=(y-1985)ln(1.032)

ln(3.812825)/ln(1.032)=y-1985

y=1985+ln(3.812825)/ln(1.032)

y≈2027.5  

So GDP will reach 2.2 trillion during the year 2027.
5 0
3 years ago
4|n|-5=7 please help me solve
DedPeter [7]
I think you meant to type

4(n)-5=7.

4n = 7 + 5

4n = 12

n = 12/4

n = 3
3 0
3 years ago
Read 2 more answers
If a car reaches speeds of 0-100 mph in 0.8 seconds, how many mph will it reach in 1 second?
zvonat [6]

Answer:

125 mph

Step-by-step explanation:

This can be calculated as a simple rule of 3.

In rule of 3 problems, you need to first identify the measures and whether they are direct or inverse to each other.

If they are direct to each other, if one value increases the other will increase too. For example, lets suppose that the Buffalo Bills have won 3 of 4 games. When there are 8 games, then will have won 6, keeping this proportion. Here, the measures are the number of games and the number of Buffalo Bills wins.

Now if they are inverse to each other, if one value increases the other will decrease. For example, if you travel at 60 mph, you will need 6 hours to arrive at your destination. At 80 mph, you will need less time. So, a the average speed increases, the time you need will decrease.

In this case the speeds is proportional to the time. So, if the time increases, the speed will increase too. It can be calculated by the following rule of 3.

   Speed               Time

 100 mph - 0.8 seconds

 x mph      -  1 second

x = 100/0.8 = 125 mph.

4 0
3 years ago
The fraction models below represent two fractions of the same whole. How much of the Fraction 5 over 8 is in the Fraction 1 over
IrinaVladis [17]

To find how much of 5/8 is you would need to divide 1/2 by 5/8:

X = (1/2) / (5/8)

When dividing fractions, you reverse the second fraction and multiply:

X = (1/2) x (8/5)

X = 8/10

Simplify:

X = 4/5

5 0
2 years ago
Read 2 more answers
Other questions:
  • The first three terms of a sequence are given. Round to the nearest thousandth (if necessary).
    7·1 answer
  • State the conditions that the following graph meets. (Enter the equation or inequality that is shown by the graph.)
    11·2 answers
  • Line CD passes through points (0, 2) and (4, 6). Which equation represents line CD?
    10·2 answers
  • Subtract5x2 + 10x<br> 1 from 6x2<br> x + 3.
    14·1 answer
  • What is this for 10 points (190×1234)+(13+1879÷1)+(1325×435)
    10·1 answer
  • Help math pls its a drag and drop
    10·2 answers
  • Determine if the triangles are congruent. If so, write a congruence statement. Explain
    12·1 answer
  • Please helppppppppppppppppppppp
    6·2 answers
  • A cell phone company offers it's customers a monthly plan that cost $55 per month plus $0.08 for each minutes used. If regina us
    7·2 answers
  • 50 POINTS .....................
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!