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
NARA [144]
3 years ago
6

It takes 40 minutes for eight people to paint four walls how many minutes does it takes 10 people to paint seven walls

Mathematics
1 answer:
sasho [114]3 years ago
8 0
8r(40)=4

r=1/80  that is the rate for each person...

10rt=7  using r we found before

10(1/80)t=7

t/8=7

t=56 minutes.
You might be interested in
3/9+2/9=?/9<br> Help a brother out
Ahat [919]

Answer:

5/9

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Simplify <br><br> 4 - 8 multiply 3/4 + 1/4
FromTheMoon [43]
The given equation is 4 - 8 * [3/4 + 1/4]
- 4 * [3/4 + 1/4]
- 4 * 1 = - 4
The answer is - 4.
6 0
3 years ago
Read 2 more answers
Can anyone show me the steps in order solve this problem
STatiana [176]
M∠A = 42°   [isosceles triangle]

m∠B = 180 - 42 - 42 = 96°  [in a triangle, the three interior angles always add to 180°]

m∠C = 180 - 96 - (x+12)
m∠C = 84 - x - 12
m∠C = 72 - x

2x+9 + 3x-1 + 72-x = 180
4x + 80 = 180
4x = 180 - 80
4x = 100
x = 100/4
x = 25

m∠C = 72 - x = 72 - 25 = 47°

<span>I hope this helped</span>

8 0
3 years ago
To the nearest degree what is the measure of each exterior angle of a regular dodecagon
malfutka [58]

Answer:

30^{\circ}

Step-by-step explanation:

We are asked to find the measure of each exterior angle of a regular dodecagon.

We know that a regular dodecagon is a 12 sided regular polygon with each side equal.

We know that measure of each angle of n-sided regular polygon can be found using formula:

\text{Each exterior angle}=\frac{360^{\circ}}{n}

Upon substituting n=12 in above formula, we will get:

\text{Each exterior angle of a regular dodecagon}=\frac{360^{\circ}}{12}

\text{Each exterior angle of a regular dodecagon}=30^{\circ}

Therefore, the measure of each exterior angle of a regular dodecagon is 30 degrees.

3 0
3 years ago
Which of the following are incorrect expressions for slope?
vfiekz [6]

Answer:

Option B and C are correct.

\frac{x_2-x_1}{y_2-y_1}

\frac{run}{rise} are the expression incorrect for slope

Step-by-step explanation:

Slope is defined as the change in the dependent variable  relative to the change in the dependent variable

or the ratio of the horizontal changes to vertical changes between any two points on the graph of the line.

The vertical changes between any two points is rise

The horizontal changes between any two points is run.

Formula for slope is given by:

For any two points (x_1, y_1) and (x_2, y_2)

then slope is:

\text{Slope} =\frac{rise}{run}= \frac{y_2-y_1}{x_2-x_1}

or we can write this as:

Δy = y_2-y_1

Δx = x_2-x_1

⇒\text{Slope} = \frac{\triangle y}{\triangle x}

Therefore, the expression which are incorrect for slope  are;

\frac{x_2-x_1}{y_2-y_1}

\frac{run}{rise}

8 0
3 years ago
Read 2 more answers
Other questions:
  • 5. It is known that the product of 4.5 and y is not less than 9.
    10·1 answer
  • How may permutations of the word “spell” are there?
    7·2 answers
  • the points (3, 9) and (-3, -9) ate plotted on the coordinate plane using the equation y=a . x ... - did
    9·1 answer
  • You are choosing a book from your friend’s book collection. You can choose 1 of 6 science fiction books, 1 of 2 mystery books, o
    7·2 answers
  • Solve each absolute value equation number 1 |2x-3|=7​
    9·1 answer
  • The equation Y-3 = -2(x+5) is written in point-slope form. What is the y-intercept of the line?
    12·1 answer
  • C.<br> In (MN) = In M + In N, for M&gt; 0 and N&gt; 0<br> True or false
    14·1 answer
  • The length of the sides of a square measure 2x-5. The length of a rectangle measures 2x, and the width measures x + 2. For what
    12·1 answer
  • Help im being timed.
    7·2 answers
  • In the figure below, triangle ABC undergoes a reflection and a translation to become triangle PQR. In triangle ABC, m <br><br> T
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!