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2 years ago

That copy machine is quick! It copied 90 pages in 3 minutes. How many copies can it make in 1 minute?

Mathematics

2 answers:

Taya2010 [7]2 years ago

8 0

Answer:

Step-by-step explanation:

earnstyle [38]2 years ago

7 0

Answer:

30 copies.

Step-by-step explanation:

Let's represent p as pages and c as copies

90p = 3 m

m = 90/3

m = 30

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Is the function increasing or decreasing over the interval [-3, -1)? Explain.

olga nikolaevna [1]

Answer:I actually don’t know

Step-by-step explanation:

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3 years ago

If the current in a circuit is 2 +j2 amps and the resistance is 3-j2 ohms, what is the voltage

victus00 [196]

Answer:

The voltage is 10 + 2j volts.

Step-by-step explanation:

Ohm's first law:

By Ohm's first law, the voltage is the multiplication of the current by the resistance, that is:

$V = R*i$

The voltage is measured in Volts, the current in amps and the resistance in ohms.

In this question:

Both the current and the resistance have complex parts. We have to know that:

$j^{2} = -1$

We have that:

$R = 3 - 2j, i = 2 + 2j$

Then

$V = R*i$

$V = (3 - 2j)*(2 + 2j)$

$V = 6 + 6j - 4j - 4j^{2}$

$V = 6 + 2j - 4(-1)$

$V = 10 + 2j$

The voltage is 10 + 2j volts.

4 0

3 years ago

The 10th grade is having a picnic this Friday. There will be 182 students and 274 adults. Each table seats 12 people. How many t

san4es73 [151]

Answer:

38 Tables

Step-by-step explanation:

182 + 274 = 456

456 / 12 = 38

4 0

3 years ago

47:30

Diano4ka-milaya [45]

Answer:

C. Determine the principal square root of both sides of the equation.

Step-by-step explanation:

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3 years ago

The circular opening of a vase has an inside diameter of 13.5 cm.

Sunny_sXe [5.5K]

Answer:

$Area = 143cm^2$

Step-by-step explanation:

Given

Shape: Opening of a circular vase

$Diameter =13.5cm$

$\pi = 3.14$

Required

Determine the area

This opening implies a circle; hence the area will be calculated using area of a circle.

$Area = \pi r^2$

Solve for radius (r)

$r = \frac{d}{2}$

$r = \frac{13.5\ cm}{2}$

$r = 6.75\ cm$

Substitute 6.75 for r in $Area = \pi r^2$

$Area = 3.14 * 6.75^2$

$Area = 143.06625$

$Area = 143cm^2$ --- Approximated

4 0

2 years ago