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3 years ago

In a video store, a DVD was $13.50. It was now marked, "10% off". What was the sale price of the DVD?

Mathematics

2 answers:

Misha Larkins [42]3 years ago

7 0

Answer:

$12.15

Step-by-step explanation:

13.50 x 0.9 = 12.15

Anvisha [2.4K]3 years ago

5 0

Answer:

$12.15

Step-by-step explanation:

10% of 13.50 is 1.35. Subtract 1.35 from 13.50 to get 12.15

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What is the product of 5.1 X 10-3 and 3.2 x 10-3?

Citrus2011 [14]

(5.1 * (10-3)) + (3.2 * (10-3))

(5.1 * 7) + (3.2 * 7)

35.7 + 22.4

58.1

So 58.1 is the final answer! Hope this helps!

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3 years ago

Two pumps are filling a pool. One of them is high power and can fill the pool alone in 2 hours less time than the other can do s

KatRina [158]

Answer:

9.1 hours

Step-by-step explanation:

Make a Chart.

Column 1 is Time it takes to do the job alone

Column 2 is Rate of Work ( 1 over the expression in Column 1)

Column 3 is Time it takes to do the job together

Column 4 is Part of the Job done ( Columns 2 and 3 multiplied together )

Row 1 is the First pipes info.

Row 2 is the Second pipes info.

The equation comes from column 4. Part of the Job from Pipe 1 + Part of the Job from Pipe 2 = 1 (the whole job)

So Row 1 for Pipe 1, the small pipe, would look like this: x , 1/x , 4 , 4/x

Row 2 for Pipe 2, the larger pipe, would look like this: x - 2 , 1/x-2 , 4 , 4/(x-2)

So, the equation would be: 4/x + 4/(x-2) = 1

Solve this equation by first multiplying both side by x(x-2) to clear the denominators.

So the equation becomes: 4(x-2) + 4x = x(x-2)

Distribute and combine like terms, then get everything on one side of the equation.

So the equation becomes: x^2 - 10x + 8 = 0

Use the quadratic equation to solve for x. Solutions are x = 9.1 and x = .9

.9 hours does not make sense so throw that solution out (with the dirty pipe water :) )

9.1 hours makes sense for how long it would take the smaller pipe working alone to fill the pool.

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3 years ago

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Kevin bought 6 hectograms of cheese selling for $9 per kilogram.

anastassius [24]

Answer:

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3 years ago

What must the measure of angle LMN be? m∠LMN = °

luda_lava [24]

Both 25x and 22x + 9 have the same answers. So you set those two equal to each other.
$25x = 22x + 9$
Subtract 22x from both sides.
$3x = 9$
and you're left with this.
Next, divide 3 from both sides.
$x = 3$
re-insert 3 into one of the equations.
$25(3) = 75$
add up both angles
$75 + 75 = 150$
all angles (for quadrilaterals)added up equals 360.
$150 + 2x = 360$
solve for x. Subtract 150 from both sides.
$2x = 210$
and divide 2 from both sides
$x = 105$
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3 years ago

Pls help me with this true or false question

dangina [55]

Answer:

from my understanding true

Step-by-step explanation:

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3 years ago

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