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Tpy6a [65]
2 years ago
11

Help me please... At least an explanation

Mathematics
1 answer:
In-s [12.5K]2 years ago
4 0

Answer:

do u still need this question answeered?

Step-by-step explanation:

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If u(x)=-2x²+3 and v(x)=1/x, what is the range of (u ° v)(x)?
Ludmilka [50]

u(x)=-2x^2+3\\\\v(x)=\dfrac{1}{x}\\\\(u\ \circ\ v)(x)=-2\left(\dfrac{1}{x}\right)^2+3=-2\left(\dfrac{1}{x^2}\right)+3=-\dfrac{1}{x^2}+3\\\\\text{The range of}\ y=\dfrac{1}{x^2}\ \text{is all positive real numbers.}\\\\\text{The range of}\ y=-\dfrac{1}{x^2}\ \text{is all negative real numbers.}\\\\\text{The range of }\ (u\ \circ\ v)(x)=-\dfrac{1}{x^2}+3\ is\ (-\infty,\ 3)

6 0
4 years ago
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Determine if the lines are parallel, perpendicular, or neither y=5 and y =-1
valkas [14]
The are parallel to each other because the are both straight horizontal lines
6 0
3 years ago
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Dorothy is half her sister's age. she will be three fourths of her sister's age in 20 years. how many years old is she?
Nitella [24]
<span>Dorthy's age is 10, she will be 30 in 20 years.</span>
6 0
3 years ago
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What is the surface area of the right rectangular prism?
Mkey [24]

Answer:

1) OPTION D.

2) OPTION D.

Step-by-step explanation:

1) You can calculate the surface area of the rectangular prism with the following formula:

SA=2(wh+lw+lh)

Where w is the width, h is height  and l is the length.

The figure show you that:

l=4m\\w=3m\\h=0.5

Then, the surface area is:

 SA=2[(3m*0.5m)+(4m*3m)+(4m*0.5m)]=31m^{2})

2) You can calculate volume of the rectangular prism with the following formula:

V=lwh

Where w is the width, h is height  and l is the length.

When you substitute values, you obtain the following result:

V=4m*3m*0.5m=6m^{3}

6 0
4 years ago
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How to make a the subject of this: <br> W= 3(2a+b) - 4
Basile [38]

Answer: a = \frac{W-3b+4}{6}

<u>Step-by-step explanation:</u>

W = 3(2a + b) - 4

W = 6a + 3b - 4

W - 3b + 4 = 6a

\frac{W-3b+4}{6} = a

8 0
3 years ago
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