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
Tasya [4]
3 years ago
13

elise takes 12 minutes to rake up and bag a pile of leaves her sister katherine takes twice as long, how many minutes would it t

ake both of them working together to complete 10 bags of leaves?​
Mathematics
1 answer:
Ymorist [56]3 years ago
8 0

Answer:

80 minutes

Step-by-step explanation:

Rate and Time are inverses of each other

First,

Elise Time = 12

and

Katherine Time = 2 * 12 = 24

Their rates would be (inverses):

Elise Rate = 1/12

Katherine Rate = 1/24

Together their rate is 1/12 + 1/24 = 3/24

Now, the inverse of this rate would be the time it takes to complete 1 bag together, that is:

(3/24) ^ -1 = 24/3 = 8 minutes

So, 10 bags would take them:

8 * 10 = 80 minutes

You might be interested in
Use the discriminant to determine the nature of the roots of the following questions
soldier1979 [14.2K]

Answer:

the function has two distinct real roots.

Step-by-step explanation:

D=b²-4ac    

D<0 No real roots

D=0 One real root

D>0 Two distinct real root.

    (-5)²-4*1*-3

    25+12

    37

Since D is > than 0, the function has two distinct real roots.

6 0
3 years ago
A rectangular room is 1.5 times as long as it is wide, and its perimeter is30 meters. find the dimension of the room.
Tpy6a [65]

Answer:

6 meters by 9 meters

Step-by-step explanation:

<u><em>Step 1: Formula for perimeter of rectangle</em></u>

Rectangle's perimeter = 2 (length) + 2 (width)

Rectangle's perimeter = 2 (length + width)

<u><em>Step 2: Find the length and width in terms of x</em></u>

Width = x

Length = 1.5 times width

Length = 1.5x

<u><em>Step 3: Find x</em></u>

Perimeter = 2(length + width)

30 = 2 (1.5x + x)

30/2 = 2.5x

15/2.5 = x

x = 6

<u><em>Step 4: Find the length and width</em></u>

Width = x = 6 meters

Length = 1.5x = 1.5(6) = 9 meters

Therefore, the dimensions of the room are 6 meters and 9 meters.

6 0
3 years ago
Sine is opposite divided by hypotenuse. So the sine of an angle times the hypotenuse is the length of the opposite side. What is
valkas [14]

Answer:

10 m

Step-by-step explanation:

opposite = sin30° × 20 = \frac{1}{2} × 20 = 10 m

7 0
2 years ago
Monte performs an experiment using 2 identical graduated cylinders, each with a radius of 2 centimeters. The volume of the liqui
elena55 [62]
Volume of a cylinder is h x r^2 x pi

You have the volume and radius of each one, so taking 188.4=(2)^2 x 3.14 x h1, you can solve this equation for the height h1. Likewise, for the other graduated cylinder you take 314=2^2 x 3.14 x h2, and then solve for h2.

To get the difference in heights, just take h2-h1 after solving the equations for h2 and h1
5 0
3 years ago
Read 2 more answers
(2x−6)+4(x−3)<br> Find the sum.
wariber [46]

Answer:

6x - 18 or 6*(x - 3)

Step-by-step explanation:

Pull out like factors: 6x - 18  =   6 • (x - 3)

Hope this helps! Please mark as brainlest.

Thanks!

6 0
3 years ago
Other questions:
  • What is the greatest possible whole-number value of the congruent side lengths?
    5·1 answer
  • What must be a factor of the polynomial function fx) graphed on the coordinate plane below?<br><br>​
    8·1 answer
  • I'm stuck on this question. Which is a graph for the inequality x &gt; 2?
    6·1 answer
  • In a simple random sample of 80 patients who saw a certain dentist nine patients had their teeth whitened.
    7·1 answer
  • Yoshi reported the total area of the five great lakes on the chart above.
    14·1 answer
  • What is the slope intercept form of the equation Y -7 equals -5 / 2 (x + 4 )
    13·1 answer
  • Function or not a function
    10·1 answer
  • There is a bag with only red marbles and blue marbles.
    11·1 answer
  • I need extreme extreme extreme extreme help.
    5·1 answer
  • Solve the exponential equation below. Express your answer exactly (i.e. do not round), usingthe common log. You must show your w
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!