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
ValentinkaMS [17]
3 years ago
5

If Joanne can paint a room in 3 hours and her sister Angela can paint the same room in 4 hours, how long (in h) would it take Jo

anne and Angela to paint the room working together? Round to the nearest tenth.
Mathematics
1 answer:
Gala2k [10]3 years ago
7 0

Answer:

Step-by-step explanation:

If J can paint a room in 3 hours, in 1 hour she gets \frac{1}{3} of the job done.

If A can paint a room in 4 hours, in 1 hour she gets \frac{1}{4} of the job done. We need to find out how long it takes them if they paint together. The equation for this is:

\frac{1}{3}+\frac{1}{4}=\frac{1}{x} where x is the number of hours it takes them to get the job done together. Multiply everything through by 12x to get

4x + 3x = 12 so

7x = 12 and

x = 1.7 hours to get the room painted together.

You might be interested in
Is this question trigonometry? How do you do it?
7nadin3 [17]
Use tan

Tan 5.1/4.2 =x^o
8 0
3 years ago
Read 2 more answers
Which answers show y + 2x < 4x - 3, rewritten to isolate y, and it’s graph?
AnnyKZ [126]

Solving  y+2x < 4x-3 for y would lead to y < 2x-3. You subtract 2x from both sides of the original inequality to get to this result.

To graph y < 2x-3, you first graph y = 2x-3 which is a straight line that goes through (0,-3) and (1,-1). This line is a dashed or dotted line as solutions are not found on the boundary. The shaded region is below the dashed/dotted boundary line to indicate where the solution set is.

To summarize: the graph is a dashed line through (0,-3) and (1,-1) with the shading below the dashed line

The answer is between A and B. It will depend on how those graphs look as to which is the final answer.

6 0
3 years ago
Read 2 more answers
Which expression is equivalent to 1/4 − 16?<br><br> A) 1/4(n − 64)<br> B) 4(n − 4)<br> C)4(n − 64)
Elza [17]
The answer is A.) 1/4(n-64) because if you distribute the 1/4 onto the parentheses it becomes n/4 - 16 which is equivalent to 1/4 - 16 if n were to equal 1.
4 0
3 years ago
Read 2 more answers
Chloe is painting on a stretched canvas that has an area of 108 square inches. The length of the canvas is 12 inches. The width
Stolb23 [73]

Answer: Width of canvas = 9 inches

Area left for painting after painting the border = 70 square inches.

Explanation :

Since we have given that

Area of painting = 108 square inches

Length of canvas = 12 inches

As we know that

\text{Area of rectangle} = length\times breadth

108=12\times breadth\\\\\frac{108}{12}=breadth\\\\9=breadth

So, breadth of canvas = 9 inches .

Now, Chloe paints a 1 inch wide blue border on the canvas.

\text{So, remaining length left for painting after painting the border} = 9-1-1=9-2=7\text{ inches}

\text{ Remaining breadth left for painting after painting the border }= 12-1-1=12-2= 10\text{ inches}

\text{So , area of remaining portion }= length\times breadth \\\\ \text{ area of remaining portion }=7\times 10\\\\\text{ area of remaining portion }=70 \text{ square inches}

Hence, remaining area = 70 square inches .

6 0
3 years ago
I don’t get it. <br> Use the net to find the lateral area of the prism.
sesenic [268]

the net is pretty much the net of a long box, kinda like the one in the example in the picture below.  Due to that, we can pretty much assume the two sides sticking up and down, are just two small 6x3 rectangles, namely, they have a height of 3, reason why we assume that, if that if we fold the other sides to make out the box, those two sides sticking out, must be 3m to neatly snugfit.


now, if we close the box as it stands, the sides(laterals) will be on the left-right sides two 3x15 rectangles, and on the front-back sides, two 6x15 rectangles.


we're excluding the top and bottom sides, because those are not "laterals", or sides of the box.


\bf \stackrel{\textit{two rectangles, left and right}}{2(3\cdot 15)}+\stackrel{\textit{two rectangles, front and back}}{2(6\cdot 15)}&#10;\\\\\\&#10;90+180\implies 270

6 0
4 years ago
Other questions:
  • 34 + 2 ⋅ 5 = ____. (Input only whole numbers.) Numerical Answers Expected! Answer for Blank 1: i will give brainliest plese
    5·2 answers
  • Help please........number 5 and 7
    9·1 answer
  • What are the roots of y=x^2+3x-10
    6·2 answers
  • Problem Solving with Circles
    13·1 answer
  • Please answer it now in two minutes
    11·1 answer
  • joe and beth both have landscaping businesses. Joe charges a flat fee of $15 to mow your yard and $8.00 for each tree he trims.
    6·1 answer
  • Please answer correctly and quickly
    9·2 answers
  • If mBAC = 90°, and mZDAC = 68°,<br> then mBAD = [?]
    9·1 answer
  • 1/4 divided by 2/5 fraction form
    6·2 answers
  • The band is selling boxes of fruit to raise money for new uniforms. Boxes of oranges cost $12 per box and boxes of grapefruits c
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!