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3 years ago

I need more math help, the!

1 answer:

4 0

Track A takes 20 minutes
Track B takes 15 minutes
In 1 minute track be will do a fraction of 1/20, while track B will do 1/15
Both tracks in a minute = 1/20+1/15
= 35/300
Therefore the two tracks will take 300/35 minutes to fill the 200 cubic feet
That is 300/35
= 8.57 minutes
≈ 9 minutes

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celina measured the height of a window frame as 5.55 feet, but the actual height was 6 feet. What is the percentage of error in

skad [1K]

(6/5.55) * 100 = 108.11 %

The percent error is 108.11 %

6 0

2 years ago

Central sub made 27 sandwiches useing 12 pounds of turkey how much turkey per sandwich?

zhannawk [14.2K]

12 pounds divided up between 27 sandwiches is 0.44 pounds for each sandwich. 12/27=0.44

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3 years ago

Solve for x. Leave your answer in simplest radical form

alexandr1967 [171]

Answer:

x = 2√7

using Pythagoras theorem:

7² + ?² = 9²

?² = 81 - 49

? = √32

? = 4√2

For the bottom part:

x² + 2² = (4√2)²

x² + 4 = 32

x² = 28

x = √28

x = 2√7

5 0

1 year ago

Read 2 more answers

The cost to rent a van is $19.50 per day plus $0.25 per mile. If you have $157 to

Jobisdone [24]

Answer:

92 miles

Write an inequality for the total cost of the rental.

Cost of the rental = 19.50+0.25x<=44

where x is the number of miles driven.

Subtract 19.50 from both sides.

0.25x<=44-19.50

0.25x<=24.5

x<=24.5/0.25

x<=98

Step-by-step explanation:

6 0

3 years ago

A large population of variable x is characterized by its known mean value of 6.1 units and a standard deviation of 1.0 units and

scoundrel [369]

Answer:

-6.134 to +6.134

Step-by-step explanation:

given that a large population of variable x is characterized by its known mean value of 6.1 units and a standard deviation of 1.0 units and a normal distribution

X is Normal with mean =6.1 and std dev = 1 unit

We are to determine the range of values containing 70% of the population of x

We know that normal distribution curve is bell shaped symmetrical about the mean.

So to find 70% range we can use 35% on either side of the mean

Using std normal distribution table the value of z for which probability from 0 to z is 0.35 is 1.034

Hence corresponding x value is

$x=6.1+1.034*1\\x=6.134$

i.e. 70% values lie between

-6.134 to +6.134

3 0

3 years ago

Read 2 more answers