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dybincka [34]
3 years ago
11

Cynthia wants to buy a rug for a room that is 18ft wide and 26ft long. She wants to leave a uniform strip of floor around the ru

g. She can afford to buy 240 square feet of carpeting. What dimensions should the rug have?
Mathematics
1 answer:
malfutka [58]3 years ago
6 0

The room is 18 ft by 26 ft which is 468 ft^2

She can afford a 240 ft^2 rug

12 * 20 = 240

She can afford a rug that is 12 ft wide by 20 ft long

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The sum of two numbers is 30. Their difference is 6. What are the numbers?
baherus [9]

Answer:

Find out the numbers .

To prove

Let us assume that one number be x.

Let us assume that second number be y.

As given

The sum of two numbers is 30.

Than the equation becomes

x + y = 30

Their difference is 6.

x - y = 6

Thus two equation are .

x + y = 30 and x - y = 6

Subtracted  x - y = 6 from x + y = 30

x - x + y - (-y) = 30 - 6

y + y  = 24

2y = 24

y = \frac{24}{2}

y = 12

Put in the x - y = 6

x - 12 = 6

x = 6 + 12

x = 18

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6 0
3 years ago
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One piece of leftover plywood is 0.75 inches thick, 3 feet wide, and 7 feet long estimate the approximate surface area of two st
Harrizon [31]

Answer:

111.6ft^2 for the two stacks

Step-by-step explanation:

0.75inch × 11 = 8.25 inches

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Here dimensions are 3 ft. Wide, and 7 ft. Long and height of stack = 0.69ft

Surface area of one stack =

2*(LW+WH+LH)

= 2*(7*3 +3*0.69+7*0.69)

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Multiply by 2 to to get surface area of 2 stacks separately

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Thea has a key on her calculator marked $\textcolor{blue}{\bf\circledast}$. If an integer is displayed, pressing the $\textcolor
worty [1.4K]

Answer:

$9$

Step-by-step explanation:

Given: Thea enters a positive integer into her calculator, then squares it, then presses the $\textcolor{blue}{\bf\circledast}$ key, then squares the result, then presses the $\textcolor{blue}{\bf\circledast}$ key again such that the calculator displays final number as $243$.

To find: number that Thea originally entered

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The final number is $243$.

As previously the $\textcolor{blue}{\bf\circledast}$ key was pressed,

the number before $243$ must be $324$.

As previously the number was squared, so the number before $324$ must be $18$.

As previously the $\textcolor{blue}{\bf\circledast}$ key was pressed,

the number before $18$ must be $81$

As previously the number was squared, so the number before $81$ must be $9$.

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3 years ago
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