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
olga2289 [7]
3 years ago
11

A chemist needs to mix a 40% hydrochloric acid with a 70% hydrochloric acid to create a 20 oz mixture that is 55% hydrochloric a

cid. How much of the 70% hydrochloric acid will she need? (don't forget your units)
PLEASE HELP ASAP
Mathematics
1 answer:
nikdorinn [45]3 years ago
5 0

Answer:

y=10

Step-by-step explanation:

You might be interested in
The area of a room is 600 square feet. The length is (x+2) feet and the width is (x+3) feet. Find the dimensions of the room
m_a_m_a [10]
Create an equation using the formula for area of a rectangle; area = width * length
(X + 2)(x + 3) = 600
Multiply the dimensions.
X^2 + 3x + 2x +6 = 600, or simplified x^2 +5x + 6 = 600.
Subtract 600 to get the following:
X^2 + 5x - 594 = 0
Factor by x:
(X - 22)(x + 27) = 0
Solve for x
X - 22 = 0
X = 22.
Use the POSITIVE VALUE of x as you can’t have a negative area for a room.
Then substitute 22 for x to get the dimensions
(22+ 2) or 24 for length and (22+3) or 25 for width.
6 0
3 years ago
Please Help!!! Evaluate the following <br><br> 2/((3-(3-1))*3-1)
antiseptic1488 [7]
2/ 3 - (3 - 1) * 3 - 1 = -4
Simplify
= 2/-4
which is
= -2/4 
Then simplify again
= -1/2
6 0
3 years ago
Solve<br> 2(2x + 1) = 3(x - 4)
k0ka [10]

Step-by-step explanation:

2(2x + 1) = 3(x - 4)

4x+2=3x-12

4x-3x=--12-2

x=14

6 0
3 years ago
Help please now help dont be childish will banned ​
belka [17]

Answer:

X, process, y

-2, 3(-2), -6

-1, 3(-1), -3

0, 3(0), 0

1, 3(1), 3

2, 3(2), 6

X = -2, -1, 0, 1, 2,

Y = -6, -3, 0, -3, -6

Step-by-step explanation:

Coordinates for the graph: (-2,-6), (-1,-3), (0,0), (1,3), (2,6)

Graph is the image I added onto this.

Solving for Y below:

3(-2)= -6

3(-1)= -3

3(0)= 0

3(1)= 3

3(2)= 6

Hope this helps.

5 0
3 years ago
Help please will mark brainliest
Natalija [7]
Is the last one please Mark me brainliest :)
7 0
3 years ago
Other questions:
  • <img src="https://tex.z-dn.net/?f=%28x%20-%207%29%28y%20-%209%29" id="TexFormula1" title="(x - 7)(y - 9)" alt="(x - 7)(y - 9)" a
    7·1 answer
  • Janet designed a star on her computer and each side had a length of 40 mm. She reduced the figure by a scale factor of 0.65. Whi
    8·1 answer
  • What is the area of the figure ​
    10·1 answer
  • Which is the correct answer?
    11·1 answer
  • Calculate the protein intake of Miss Exercise who weighs 112 lb. Remember: (0.45)(w-lb) = (w-kg) and the recommended protein in
    15·2 answers
  • Taking a discount of 50% off followed by a discount of 50% off results in a total discount of _____.
    9·1 answer
  • What is the slope of the line when the line crosses through (4,5)
    5·1 answer
  • EASY POINTS<br> PLEASE ANSWER<br> :)<br><br> LOTS OF POINTS!!!!!!!!!!!!!!!!!!!!!!
    7·1 answer
  • Sam and Bryan meet at the gym. Sam travels 6 miles farther to the gym than Bryan. Three times the distance Bryan travels is 12
    5·1 answer
  • What is the value of 0 in the number 9,603,450,503
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!