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strojnjashka [21]

4 years ago

9

The family room in Zacks home is 6.5 ft by 9 ft.The floor in the room is 10 by 12 ft.how much area of the floor is not covered b

y rug.

2 answers:

balandron [24]4 years ago

7 0

61.5 of the area is covered by rug

In-s [12.5K]4 years ago

3 0

6.5 x 9=58.5
10 x 12=120
120-58.5=61.5

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Answer:

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Step-by-step explanation:

Given that the price that Tyler pays for gas varies directly with the number of gallons he buys.

The cost 24 gallons is $59.76 to him.

Now we need to find the cost of 30 gallons.

To solve this problem use a direct variation formula.

Solve for constant variation.

Step 1 of 3

Here we need to find the cost of 30 gallons.

Given that the price that Tyler pays for gas varies directly with the number of gallons he buys.

The cost of 24 gallons is $59.76 to him.

Let, x be the number of gallons and y be the cost or price for gas.

Use the formula for direct variation which is given by y=kx.

Step 2 of 3

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Put value in y=kx, we get

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Step 3 of 3

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Brilliant_brown [7]

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Step-by-step explanation:

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Leno4ka [110]

Answer:

$x=2+\frac{1}{2}\sqrt[]{21}$

or

$x=2-\frac{1}{2}\sqrt{{21}$

Step-by-step explanation:

$4x^2-16x-26=-21$

Add 21 on both sides.

$4x^2-16x-26+21=-21+21$

$4x^2-16x-5=0$

a=4

b=-16

c=-5

$x=\frac{-b\frac{+}{}\sqrt[]{b^2-4ac} }{2a}$

$x=\frac{-(-16)\frac{+}{}\sqrt[]{(-16)^2-4(4)(-5)} }{2(4)}$

$x=\frac{16\frac{+}{}\sqrt[]{256+80} }{8}$

$x=\frac{16\frac{+}{}\sqrt[]{336} }{8}$

$x=\frac{16\frac{+}{}\sqrt[]{2^2*2^2*21} }{8}$

$x=\frac{16\frac{+}{}2*2\sqrt[]{21} }{8}$

$x=\frac{16\frac{+}{}4\sqrt[]{21} }{8}$

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$x=\frac{16}{8}+\frac{4\sqrt[]{21}}{8}$

$x=2+\frac{1}{2}\sqrt[]{21}$

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

$x=\frac{16}{8}-\frac{4\sqrt[]{21}}{8}\\x=2-\frac{1}{2}\sqrt{{21}$

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3 years ago

Read 2 more answers