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3 years ago

Solve this nakandbxbdbxbxvvxs

Mathematics

1 answer:

Neko [114]3 years ago

7 0

Answer:

x=12

Step-by-step explanation:

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ach light bulb at Hotel California is either incandescent or fluorescent. At a certain moment, forty percent of the incandescent

Trava [24]

Answer:

10%

Step-by-step explanation:

The computation of the percentage of bulbs that switched on incandescent is as follows;

Let us assume the incandescent be I

And, the fluorescent be F

Now the equation is

0.4I + 0.9F = 0.8 (I+F)

0.41I + 0.9F = 0.8I + 0.8F

So here

0.4I = 0.1F

Now the percentage would be for incandescent in the case of switched on is

= 0.4I ÷ 0.8(I+F) × 100

= 0.1F ÷ 1F

= 10%

6 0

3 years ago

What’s the square root of 8 (20 points)

antoniya [11.8K]

Answer:

answer is 2

Step-by-step explanation:

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3 years ago

-2x +8 < 42 plz help solve for x BRAINLIEST

kicyunya [14]

Answer:

Inequality Form: x > -17

Interval Notation: (-17, ∞)

Step-by-step explanation:

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7 0

3 years ago

What is the geometric mean of 4 and 10

GalinKa [24]

Answer: 6.3

Step-by-step explanation:

The formula for geometric mean is given as :

G.m = $\sqrt{pq}$

Therefore , the geometric mean between 4 and 10 will be :

G.m = $\sqrt{4(10)}$

= $\sqrt{40}$

= 2 $\sqrt{10}$

= 6.3

8 0

4 years ago

Cynthia Besch wants to buy a rug for a room that is 19 ft wide and 32 ft long. She wants to leave a uniform strip of floor aroun

Rainbow [258]

Answer:

The rug should be 15 ft wide and 28 ft long.

Step-by-step explanation:

I have attached a figure that represents the situation.

The the rug is $l$ by $h$ , the width of the strip of floor is $w$ .

We are told that Cynthia can only afford 420 square feet of carpeting; therefore, it must be that

$l*h=420$ (this says the area of the rug must be 420 square feet)

From the figure we see that

$l= 32-2w$

$h=19-2w$

Therefore,

$l*h=420\\\\(32-2w)(19-2w)=420$

We expand this equation and get:

$4w^2-102w+608=420\\\\4w^2-102w+188=0$

using the quadratic equation we get two solutions:

$w=2\\w=23.5$

since the second solution, namely $w=23.5$ , is larger than one of the dimensions of the room (is greater than 19 ft) it cannot be the width of the strip; therefore, we take $w=2$ to be our solution.

Now we find the dimensions of the rug:

$l=32-2(2)=28\\\\h=19-2(2)=15$

The rug is 15 ft wide and 28 ft long.

8 0

4 years ago