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3 years ago

how would you say "the function is positive from -9 to 3 over the x axis but -9 is not included" using interval notation

Mathematics

1 answer:

notka56 [123]3 years ago

5 0

Answer:

The function would be positive in:

Step-by-step explanation:

A function is considered positive on the X-axis when the changed values in the function are greater than zero. f(x) > 0

And is considered negative when f(x) < 0.

In this case, the numbers that make the function positive are the numbers from -9 to 3, but not including -9.

This can be written as (-9, 3]

It means that -9 is not taken but any number greater than -9 is.

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Step-by-step explanation: In a hour she can rack 3 backyard. The question asked that how much of a backyard can she rake in 1 hour. She can rake the whole backyard in a hour.

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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:

A = 5 V

f = 1 * 10⁶ Hz

Angular Frequency, w, is given as:

w = 2πf

w = 2 * π * 1 * 10⁶ Hz

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The wave equation becomes:

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The correct answer is b.

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3 years ago

Use the given information to write a linear equation in slope- intercept form...

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Answer:

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Step-by-step explanation:

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2 years ago

Seven tenths of what number is 9.1

8090 [49]

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3 years ago

Question 11-(3 marks available)

klasskru [66]

Answer: 1080 $cm^{2}$

Determine the values of b1, b2, and b3, the sides of the triangular base. Also determine the value of h, the height of the triangular base and l, the length of the prism (the length between the bases).

The sides of the triangular base are:

b1 = 13 in.

b2 = 14 in.

b3 = 15 in.

The triangular base is a right triangle, and so the height is one of our sides. We will use

h = 12 in.

The length of the prism is

l = 20 in.

total surface area = bh + (b1+b2+b3)*l

bh = 12*20 = 240 $cm^{2}$

l * (b1+b2+b3) = 20*(13 + 14+ 15) = 840 $cm^{2}$

TSA = bh + l * (b1 + b2 + b3) = 240 + 840 = 1080 $cm^{2}$

to know more about prism,

brainly.com/question/16128664

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1 year ago

how would you say "the function is positive from -9 to 3 over the x axis but -9 is not included" using interval notation​

how would you say "the function is positive from -9 to 3 over the x axis but -9 is not included" using interval notation