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
grin007 [14]
3 years ago
13

Jenna can paint the shed in 2 hours. Juan can paint it in 1.5 hours. • Jenna says is they work together the job will take 1/2+1/

1.5=1^1/2 hours. • Juan says if they work together the job will take 2+1.5/2=1^3/4 hours. Determine if either Jenna or Juan is correct. Explain your reasoning with numbers and words.
Mathematics
2 answers:
Harlamova29_29 [7]3 years ago
8 0

Answer:

There is a formula for this:

[Worker 1 Time * Worker 2 Time] / [Worker 1 Time + Worker 2 Time]

[2 * 1.5] / [2 + 1.5] = 3.0 / 3.5

= 0.8571428571 Hours =

51.43 minutes

Both Jenna and Juan are INCORRECT.

Step-by-step explanation:

Nostrana [21]3 years ago
7 0

Answer:

Step-by-step explanation:

1 job / 2 hours + 1 job / 1.5 hours = 1 job / x  When they work together.

1/2 + 1/1.5 = 1/x                Basic Equation. Change to decimal form

0.5 + 0.6666 = 1/x          Add like terms on the left

1.1666666 = 1/x              Multiply by x on both sides.

1.1666667 x = 1               Divide by 1.16666667

x = 1 / 1.166667               Do the division.

x = 0.8571428              

x = 6/7 of an hour.

This kind of question will <em>always</em> produce an answer that is less than the smallest number.

So the answer must be smaller than 2 hours or 1.5 hours.

You might be interested in
What is the percentage of 13/16
Fed [463]
13/16= 0.8125

Hope this helps!
7 0
3 years ago
Read 2 more answers
A manufacturer of radial tires for automobiles has extensive data to support the fact that the lifetime of their tires follows a
Diano4ka-milaya [45]

Answer:  (C) 0.1591

Step-by-step explanation:

Given : A manufacturer of radial tires for automobiles has extensive data to support the fact that the lifetime of their tires follows a normal distribution with

\mu=42,100\text{ miles}

\sigma=2,510\text{ miles}

Let x be the random variable that represents the lifetime of the tires .

z-score : z=\dfrac{x-\mu}{\sigma}

For x= 44,500 miles

z=\dfrac{44500-42100}{2510}\approx0.96

For x= 48,000 miles

z=\dfrac{48000-42100}{2510}\approx2.35

Using the standard normal distribution table , we have

The p-value : P(44500

P(z

Hence, the probability that a randomly selected tire will have a lifetime of between 44,500 miles and 48,000 miles =  0.1591

3 0
3 years ago
29/2 written as a mixed number?
Andru [333]

Answer:

14 \frac{1}{2}

Step-by-step explanation:


5 0
2 years ago
Read 2 more answers
Evaluate the given expression. 5 P 2
Mamont248 [21]

Answer:

20

Step-by-step explanation:

nPr = n!/(n-r)!

5P2 = 5!/(5-2)!

= 5!/3!

= 5×4×3!/3!

= 5×4

= 20

7 0
2 years ago
A diagram of a pizza is shown.
mash [69]

Answer:

A. 30 cm

Step-by-step explanation:

The surface area of a 14-inch pizza is 3.14 x 49 (7 x 7 = 49) = 153.86 square inches of surface area

4 0
2 years ago
Other questions:
  • A^-5b^-4/a^-13b^8 a. a^8 b^12 b. ab^5 c. a^8/b^12 d.b^-9/b^-5
    15·1 answer
  • The complement of every acute angle must be
    12·1 answer
  • A purple paint is made by mixing 15oz of of red paint,and 5oz of boue paint. What percent of the paint is blue paint.
    9·1 answer
  • What is my fav color/ what is statistical and non statistical
    12·1 answer
  • Solve (-4-7i)-(4+5i)-(2-i)
    10·1 answer
  • mr wells tells his class of 24 that when the have completed the assigns, they may play onling math games. at the end of class, 4
    11·2 answers
  • People asked what the Absolute Value Homework looked like so here it is. I appreciate the help!
    5·2 answers
  • help plzz) A teacher made a copy of a map. To make the map easier to see, the teacher enlarged the area of the map by 38%. Let d
    13·1 answer
  • Help me solve this i need serious help for test ​
    15·1 answer
  • Can you explain how you got your answer?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!