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Scrat [10]
4 years ago
8

Evaluate the function. Find f(5). f(x)=2x2-1. The second 2 is a exponent

Mathematics
1 answer:
nata0808 [166]4 years ago
4 0

Answer:

f(x)=2x^2-1\\f(5)=2(5)^2-1\\f(5)=2(25)-1\\f(5)=50-1\\f(5)=49

Step-by-step explanation:

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What is the image of the point (5,-4) after a rotation of 90° counterclockwise about the origin?​
Debora [2.8K]

Answer:

(4,5)

Step-by-step explanation:

Rotating a <em>point </em>by 90 degrees <em>counterclockwise</em> would make the y become x and switch it's negative/positive value, and make x the y.

Ex: (x,y) would become (-y,x)

4 0
3 years ago
A pet store has 7 canaries and 3 parrots.The ratio of the number of parrots to the total number of birds is
wel

Answer:

3 : 10

Step-by-step explanation:

most simplified form

6 0
3 years ago
Which statement is true about the extreme value of the given quadratic equation? y = -3x2 + 12x − 33
Zina [86]

Answer:

The equation has a maximum value with a y-coordinate of -21.

Step-by-step explanation:

Given

y =-3x^2 + 12x - 33

Required

The true statement about the extreme value

First, write out the leading coefficient

Leading = -3

-3 < 0 means that the function would be a downward parabola;

Downward parabola always have their vertex on top of the parabola and as such, the function has a maximum value.

The maximum value is:

x = -\frac{b}{2a}

Where:

a= -3; b =12; c =-33

So, we have:

x = -\frac{12}{2 * -3}

x = -\frac{12}{-6}

x =2

Substitute x =2 in y =-3x^2 + 12x - 33

y = -3*2^2 + 12 * 2 - 33

y = -21

<em>Hence, the maximum is -21.</em>

8 0
3 years ago
Please answer this question
IceJOKER [234]

Hey!

------------------------------------------------

Solution:

In Picture!

------------------------------------------------

Answer:

\large\boxed{-\frac{9}{10} }

------------------------------------------------

Hope This Helped! Good Luck!

7 0
3 years ago
4. On the day Alex was born, his father invested $5000 in an account with a 1.2% annual growth rate.
sergij07 [2.7K]

Answer:

A)    A(t) = 5000(1 + 0.012)t

B)    A(t) = 106260

Step-by-step explanation:

A) 5000 is the initial amount, 1 + 0.012 is the interest rate, and t represents the years.

B) When we plug 21 into the equation,  we get 106260.

I hope this helps!

7 0
3 years ago
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