3 years ago

#4

Mathematics

1 answer:

Solnce55 [7]3 years ago

5 0

............15n+12b

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You have to order fencing for a 25-acre, rectangular field. One side of the field measures exactly ¼ mile. How many yards of fen

zysi [14]

Answer:

1430 yards

Step-by-step explanation:

Note that $1\text{ acre}=\dfrac{1}{640}\text{ square mile}.$ Then

$25\text{ acres}=\dfrac{25}{640}\text{ square mile}.$

If one side of the restangular field measures exactly $\dfrac{1}{4}$ mile, then let the second side be x miles and

$\dfrac{25}{640}=\dfrac{1}{4}\cdot x,\\ \\x=\dfrac{\frac{25}{640}}{\frac{1}{4}}=\dfrac{25}{640}\cdot \dfrac{4}{1}=\dfrac{25}{160}=\dfrac{5}{32}\ mile.$

The perimeter of the rectangle will be

$P=2\cdot \dfrac{1}{4}+2\cdot \dfrac{5}{32}=\dfrac{2\cdot 8+10}{32}=\dfrac{26}{32}=\dfrac{13}{16}\ mile.$

Since $1\ mile=1760\ yards,$ then $\dfrac{13}{16}\ mile=\dfrac{13}{16}\cdot 1760=1430\ yards.$

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3 years ago

A television and DVD player cost a total of $1257 the cost of the television is two times the cost of the DVD player find the co

Debora [2.8K]

Tv=t
dvd=d

t+d=1257

t=2d
d=d

2d+d=1257

3d=1257

divide 3 from each side

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3 years ago

OFFERING A LOT OF POINTS. please write 2 or

romanna [79]

Answer:

Rhode Island has 1,000,000 people within an area of 1000 sq miles.....

1,000,000/1000 = 1000 people per sq mile

Step-by-step explanation:

If Alaska had the same number of people per square mile as Rhode Island, its population would be calculated as 663,000 mi^2 times 1,000 people = 663,000,000 people.

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3 years ago

-2(7x - 5) <br> i've done everything i could , i hate new math help

Oksi-84 [34.3K]

Answer:

-14x+10

Step-by-step explanation:

-2(7x - 5)

-14x+10

well thats hard

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2 years ago

Read 2 more answers

The principle of Park Middle School counted all the students in the seventh grade. She found that the ratio of boys to girls was

LenaWriter [7]

Answer:

Step-by-step explanation: 14 '/. 4=26 and 42+26=68

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2 years ago