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3 years ago

A train ride covers a distance of 3 miles in 20 minutes what is the speed for the ride in miles per minute?

Mathematics

1 answer:

Digiron [165]3 years ago

8 0

About 7 mins per mile
20/3= 6.67

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A web music store offers two versions of a popular song. The size of the standard version is 2.3 megabytes (MB). The size of the

Effectus [21]

answer

240 standard versions

set up equations

s = number of standard versions

h = number of high quality versions

the total size of all standard versions would be 2.3s since each standard version is 2.3 MB

the total size of all high quality versions would be 4.4h since each standard version is 4.4 MB

add them together to get the total size (2664 MB) of all versions

2664 = 2.3s + 4.4h

since the high quality version was downloaded twice as often as the standard, we can say that

h = 2s

substitute h into equation and solve

2664 = 2.3s + 4.4h

h = 2s

2664 = 2.3s + 4.4(2s)

2664 = 2.3s + 8.8s

2664 = 11.1s

s = 2664/11.1

s = 240

7 0

2 years ago

Can someone help me<br> 7 + 2h = 3 + 4h

STALIN [3.7K]

h = 2

$7 + 2h = 3 + 4h$

You must isolate the variable to solve using the order of operations, or PEMDAS.

$4 = 2h$

Subtract 3 from both sides of the equation, and subtract 2h from both sides of the equation.

$\frac{4}{2} = h$

Divide both sides of the equation by 2.

$h = 2$

7 0

3 years ago

-3(x-4)=2x+4-x

Rudik [331]

Answer:

C. x=2

Step-by-step explanation:

-3(x-4)=2x+4-x

-3x+12=x+4

+3x +3x

-----------------------

12=4x+4

-4 -4

-----------------------

8=4x

-- ---

4 4

-----------------------

x=2

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3 years ago

How can division be represented by using a fraction? Give a real world example

Anika [276]

Answer:

Step-by-step explanation:

4/5 is the same as 4 divided by 5.

you had 4/5 of a cookie. How much percent did you have ?

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1 year ago

Read 2 more answers

1. Using the letters in the word FABRIC, find the number of permutations that can be formed using 2 letters at a time. Show your

Lisa [10]

1. Each letter is paired with each of the other letters to produce all the permutations of 2 letters. There are 6×5 = 30 of them.

FA FB FR FI FC .. A.F AB AR AI AC .. BF BA BR BI BC .. RF RA RB RI RC .. IF IA IB IR IC .. CF CA CB CR CI

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2 years ago