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3 years ago

Given that 2 x − 2 y = 23 Find x when y = 9

Mathematics

2 answers:

saveliy_v [14]3 years ago

7 0

Answer:

20.5

Step-by-step explanation:

2x - 2y = 23

2x - 2(9) = 23

2x - 18 = 23

2x = 23 + 18

2x = 41

x = 20.5

gulaghasi [49]3 years ago

4 0

Answer:

$x=41/2=20.5$

Step-by-step explanation:

So we have the equation:

$2x-2y=23$

And we want to find x when y is 9.

So, substitute y for 9 and solve for x:

$2x-2(9)=23$

Multiply:

$2x-18=23$

Add 18 to both sides:

$2x=41$

Divide both sides by 2:

$x=41/2=20.5$

So, our answer is 20.5

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Write a recursive rule: <br><br>-2,0,2,4,6

bearhunter [10]

Write a recursive rule for the sequence.

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STEP 1:

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2 years ago

The yearly attendance at a local movie theater is 68,000 and grows continuously at a rate of 3.5% each year what is the approxim

asambeis [7]

$3.5 \times 8 - 68000$
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3 years ago

Read 2 more answers

A long distance phone service charges $0.30 for the first 10 minutes and $0.05 for each additional minute or fraction thereof. U

olga nikolaevna [1]

Answer: Our Cost function is discontinuous at every integer after x>10.

Step-by-step explanation:

Since we have given that

For the first 10 minutes , the service charges = $0.30

Let the number of additional minute be 't'.

Amount charge for each additional minute = $0.05

Using the greatest integer function:

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4 0

3 years ago

A UFO is coming in to pick up some test subjects. Their elevation above the ground is 60,000 feet. Their laser sights tell them

charle [14.2K]

Answer:

41.83°

Step-by-step explanation:

It is given that :

The vertical distance of the UFO from the ground = 60,000 feet

The diagonal distance of the landing area to the UFO = 90,000 feet

In order to find the angle of depression, we have to use the trigonometric ratios, i.e.,

$\sin \ \theta = \frac{\text{perpendicular distance}}{\text{hypotenus}}$

$\sin \ \theta = \frac{60,000}{90,000}$

$\sin \ \theta = \frac{2}{3}$

$\sin \ \theta = 0.667$

∴ $\theta = \sin^{-1 }(0.667)$

= 41.83°

3 0

3 years ago

To convert 8.5 yards to feet, which ratio could you multiply by

Korvikt [17]

You could multiply 8.5 by 12 centimeters

3 0

3 years ago