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2 years ago

Can you help me, please

Mathematics

1 answer:

mars1129 [50]2 years ago

5 0

Answer:

you: 25h + 100

friend: 20h + 120

same amount of pages: 4 hours

Step-by-step explanation:

Every hour you read 25 pages. I used h to represent hour. It doesnt really matter. That starts your equation at 25h. You already read 100 pages, so we simply add 100 and thats your equation. We use the same thinking for the friend's equation.

To find how many hours it will take for them to read the same amount, we write the equations as an equality. Because we need them to be the same, see?

Work through the equation to get your h on one side and the numbers on the other. We come up with 4.

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Answer:

Step-by-step explanation:

13.50 - 3 = 10.50

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2 years ago

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3 years ago

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Vanyuwa [196]

Answer:

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2 years ago

Solve the following quadratic equations by completing the square.<br><br> y^2-14y+48=0

NISA [10]

Answer:

y = 6 or 8

Step-by-step explanation:

1. Subtract the constant:

y^2 -14y = -48

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Write as a square, if you like:

(y -7)^2 = 1

3. Take the square root:

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3 years ago

A sinusoidal carrier wave has an amplitude of 5 volts, a frequency of 1MHz, and zero phase angle. Select the correct carrier wav

Vedmedyk [2.9K]

Answer:

The correct answer is b.

Step-by-step explanation:

The wave equation is given generally as:

c(x, t) = Acos(kx - wt)

Where A = amplitude

k = wave number

w = angular frequency.

x = horizontal distance moves by the wave.

t = time

The options show to us that the wave depends only on t and not (x, t).

Hence, the wave equation becomes:

c(t) = Acos(wt)

Given that:

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w = 2πf

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w = 2π(1 * 10⁶)

The wave equation becomes:

c(t) = 5cos(2*π*1*10⁶)

The correct answer is b.

6 0

3 years ago