3 years ago

The function f is defined by f(x)=x^2-5 find f(2y)

Mathematics

1 answer:

Anuta_ua [19.1K]3 years ago

4 0

$\bf f(x)=x^2-5\qquad \qquad f(2y)=(2y)^2-5\implies f(2y)(2^2y^2)-5
\\\\\\
f(2y)=4y^2-5$

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Enter your answer and show all the steps that you use to solve this problem.

slamgirl [31]

Answer:

h = -t+20

After 8 hours the candle will be 12 inches

Step-by-step explanation:

We have 2 points (time, inches)

(3,17) and (5,15)

We can find the slope

m = (y2-y1)/(x2-x1)

= (15-17)/(5-3)

= -2/2

= -1

We can use point slope form

y-y1 = m(x-x1)

Replace y with h and x with t

h-17 = -1 (t-3)

Distribute

h-17 = -t+3

Add 17 to each side

h-17+17 = -t+3+17

h = -t+20

3 0

3 years ago

Physicians at a clinic gave what they thought were drugs to 860 patients. Although the doctors later learned that the drugs were

Alexus [3.1K]

Answer:

Z=2.36

P=0.0091

Step-by-step explanation:

The hypothesis is:

π > 0.55 which is the population proportion

The formula to get the test statistic is

Zstat = P-π/√π(1-π)/n

P =507.4/860 = 0.59 (sample proportion )

n =860 (sample size)

π =0.55(population porportion)

Zstat = 0.59-0.55/√0.55(1-0.55)/860

Zstat =2.36

From Z table the probability of Z score of 2.36 is 0.9909

To calculate for P- value will then be

P= 1 - 0.9909

P= 0.0091

4 0

3 years ago

(-7,2) under a translation by 8 units to the right and 2 units up

11111nata11111 [884]

Step-by-step explanation:

(1,4)

I hope this will help you

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3 years ago

Read 2 more answers

The cost of fencing a Square Garden is 400 at the rate of 1 per metre find its length

grin007 [14]

Here Is The Answer:

Perimeter of garden = 400 m

side of square = 400 / 4

= 100 m

Area of garden => 100 m x 100 m

=> 10000 m^2

Hope It Helps You!!!

Have A Nice Day!!! ^_^

8 0

3 years ago

Write this percent as a fraction. 56 1/4 % (56 whole number and 1/4)

3241004551 [841]

56 $\frac{1}{4}$ %

= $\frac{225/4}{100}$

= $\frac{225}{400}$

= $\frac{9}{16}$ (Answer)

3 0

3 years ago