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3 years ago

F(x) = x2 - 5

2 answers:

7 0

For x=2, substitute in F(x) to find y ---> 2^2-5 =-1
for x=4 , F(4) = 4^2-5 = 11
for x=7 , F(7) = 7^2-5=44
The range is {-1, 11, 44}

Olenka [21]3 years ago

5 0

Well the person before me got it correct. the answer is D I've taken the test

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Find sin20 if sin 0 = 3; 90° < 0 < 180°

Alex777 [14]

Answer:

$\sin 2 \theta = -\dfrac{4\sqrt 5}{9}$

Step-by-step explanation:

$\text{Given that,}\\\\~~~~~~\sin \theta = \dfrac 23\\\\\implies \sin^2 \theta = \left( \dfrac 23 \right)^2\\\\\implies 1- \cos^2 \theta = \dfrac 49 \\\\\implies \cos^2 \theta = 1 - \dfrac 49 \\\\\implies \cos^2 \theta = \dfrac 59\\\\\implies \cos \theta = \pm\sqrt{\dfrac 59} \\\\\implies \cos \theta = \pm \dfrac{\sqrt 5 }3\\\\\text{Since}~ 90^\circ < \theta < 180^{\circ},~\text{the angle lies in 2nd quadrant}\left(\cos \theta ~\text{is negative}\right).\\\\$

$\text{So,}~ \cos \theta = - \dfrac{\sqrt 5 }{3}\\\\\text{Now,}\\\\\sin 2\theta = 2\sin \theta \cos \theta \\\\\\~~~~~~~~=2 \cdot \dfrac 23 \cdot \left( -\dfrac{\sqrt 5}{3} \right)\\\\\\~~~~~~~~=-\dfrac{4\sqrt 5}{9}$

$\textbf{Quadrant rule:}\\\\$

6 0

2 years ago

The triangular region shows the number of possible ounces of platinum, x, and the number of possible ounces of silver, y, a jewe

LiRa [457]

Below are the choices that can be found elsewhere:

A.12 oz of gold and 20 oz of silver

B.10 oz of gold and 10 oz of silver

C.16 oz of gold and 30 oz of silver

D.25 oz of gold and 20 oz of silver

The answer is A because the points(12,20) are in the blue shaded area.
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.

4 0

3 years ago

Write the base number for the expression.

jeka94

Answer:

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A coat is currently $139.99 it is going to be on sale for 30% off how much would you save

larisa86 [58]

Answer:

you would save $41.99

Step-by-step explanation:

(139.99)(.3)=41.99

this should be right, have a good day.

3 0

2 years ago

Lincoln is seeking a loan with a simple interest rate of 8% per year. If he wants to borrow $5000, then how much will he be char

babymother [125]

Answer:

Lincoln will be charged $9,600.

Step-by-step explanation:

To find the answer we will first turn 8% into a decimal. 8 ÷ 100 = 0.08. Now multiply 0.08 by $5,000 and we get $400. then multiply $400 by 24 and we get $9,600. Therefore, $9,600 is our answer.

8 0

4 years ago