Question

Shawn and Ellie are construction workers. Shawn can complete a concrete job in 4 hours, while Ellie can complete it in 6 hours. The foreman says that it will take them 5 hours to complete it if they work together. Explain each step in solving this equation, and determine if the foreman is correct or not.

Answer 1

The foreman is incorrect. If one person can finish the job alone in 4 hours then working together the job must be done faster than that

To do the proper calculation let x be the number of hours

Shawn does 1/4 of the job per hour so his contribution is

(1/4)x

Same reasoning for Ellie’s being (1/6)x

Adding them together to complete 1 full job

(1/4)x + (1/6)x = 1
Solve for x

Answer 2

How does oxygen travel throughout the human body? Put the following statements in the correct order starting with how oxygen enters the body.

Answer 3

happy early bday Valirium!

Answer 4

Are two congruent figures also similar? Explain.

Answer 5

Happy early bday val

(just looking for some free points my dude.)

Answer 6

Happy Birthday Valirium, Hope you have a Great and Wonderful birthday and you get everything you ever wanted for your Very Special day ( Your birthday) .

Answer 7

Happy Birthday, Valirium

Answer 8

A white-tailed deer can sprint at speeds up to 30 miles per hour. American bison can run at speeds up to 3,520 feet per minute.

Answer 9

Fill in the blank with the correct form of the verb in the present tense. You may copy and paste the accented and special characters from this list if neede

Answer 10

Given:
AB = BC

Angle BDC = 37u00bdu00b0

CBD =

37.5
60
105

Answer 11

Is it bad that I have a Hatsune Miku poster and a My Hero Academia poster?

Answer 12

buffers question: You need to prepare an acetate buffer of pH 6.21 from a 0.895 M acetic acid solution and a 2.

Answer 13

biochem buffers question

Answer 14

help me with spanish

Answer 15

Two separate bacteria populations grow each month and are represented by the functions f(x) = 3x and g(x) = 7x + 6.

Answer 16

solution check: find the parametric equation of line thru (9,6,-5) perpendicular

Answer 17

parametric equation of line through (1,5,-3) parallel to x-axis?

Answer 18

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Answer 19

calc III: volume of parallelepiped u200bA(0u200b,0u200b,0u200b), u200bB(3u200b,1u

Answer 20

The Life of an African American

Answer 21

Evaluate the extent to which the industrial and business leaders of 1865-1900 should be characterized as robber barons or captains of industry.