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
Harlamova29_29 [7]
3 years ago
10

A chemist needs a 70% solution of tannic acid. How much distilled water must he add to 5 gallons of a 90% solution of acid to ob

tain the 70% solution?
Mathematics
1 answer:
kolezko [41]3 years ago
6 0
<span>4.5 + 0 = 3.5 + 0.7x
1 = 0.7x
x = 1/0.7
x = 1.43 gallons of distilled water 
Hope this helps!!</span>
You might be interested in
What's the distance between 3 1/4 and 6 1/2?
Basile [38]
6 1/2 - 3 1/4 = 13 / 2 - 13 / 4 = 26 / 4 - 13 /4 = 13 / 4 is the distance;
4 0
3 years ago
Enter your answer as a fraction, in simplified form<br><br> −1/4⋅(−6/11)
coldgirl [10]
-3/22?? I believe that's the answer
6 0
4 years ago
Read 2 more answers
= 118
oee [108]

Answer:

number of $20 bill = 4

Number of $5 bill = 5

Step-by-step explanation:

Given that:

Total number of $5 and $20 bills = 9

Let :

Number of $5 bills = x

Number of $20 bills = y

Combined worth of all bills = $105

x + y = 9 - - - (1)

5x + 20y = 105 - - - (2)

From (1)

x = 9 - y

Substitute x = 9 - y into (2)

5(9 - y) + 20y = 105

45 - 5y + 20y = 105

15y = 105 - 45

15y = 60

y = 60/15

y = 4

x = 9 - y

x = 9 - 4 = 5

Hence,

number of $20 bill = 4

Number of $5 bill = 5

6 0
4 years ago
When converting a improper fraction into a mixed number how do you find the denominator for the mixed number?
SVETLANKA909090 [29]

answer: the denominator of the improper fraction is the sum of the numerator and the product of denominator and the whole number of the mixed fraction.

6 0
3 years ago
Read 2 more answers
What is the solution of the equation?<br>-5=q+2​
jeyben [28]

Step-by-step explanation:

-5=q+2

-5+2=q

q= -3

hope it helps.

3 0
3 years ago
Read 2 more answers
Other questions:
  • How to solve a system of two linear equation???
    11·1 answer
  • Which rotational direction would move the point (0,9) to (-9,0) by a rotation of 90 degrees
    13·1 answer
  • the steps you would take in order to simplify the expression 4a-3{a-(2a+1)} i will mark brainliest answer
    8·1 answer
  • Which of the following equations is written in standard form?
    10·1 answer
  • What is the radius of a sphere with a volume of 4.5π cubic centimeters?
    7·2 answers
  • How do I find the slope if the fraction is improper? Do I leave it the same or?
    7·2 answers
  • Which expressionis equivalentto 83,100 in expand formusing power of 10?​
    7·1 answer
  • Find the value of x that makes p||q
    5·1 answer
  • A water bottle contains 500 mL of water. If your goal is to drink 4L of water each day, what percent is the water bottle of your
    14·1 answer
  • The question is too hard
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!