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3 years ago

Domain and range and function or not

Mathematics

1 answer:

aksik [14]3 years ago

4 0

Answer:

Domain: -2,0,1,3,4

Range: 2,3

Yes its a function

Step-by-step explanation:

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The piecewise function f(x) is graphed below. What is the value f(2).

Aleks [24]

Answer:

f(2) = -1

Step-by-step explanation:

Looking at the graph, there appears to be two points at x = 2. However, looking more closely, we see that the point (2, 4) is empty; this means the graph goes up to this point but does not hit this point.

The point (2, -1) is filled in; this means the graph hits this point.

5 0

3 years ago

Read 2 more answers

Right △ABC has its right angle at C, BC=4 , and AC=8 .

PolarNik [594]

Answer:

Part A) $sin(A)=\frac{\sqrt{5}}{5}$

Part B) $tan(B)=2$

Part C) $sec(A)=\frac{\sqrt{5}}{2}$

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the length side AB (hypotenuse of the right triangle)

Applying the Pythagorean Theorem

$AB^2=BC^2+AC^2$

substitute the given values

$AB^2=4^2+8^2$

$AB^2=80$

$AB=\sqrt{80}\ units$

simplify

$AB=4\sqrt{5}\ units$

step 2

Find sin(A)

we know that

In the right triangle ABC

$sin(A)=\frac{BC}{AB}$ ----> by SOH (opposite side divided by the hypotenuse)

substitute the given values

$sin(A)=\frac{4}{4\sqrt{5}}=\frac{\sqrt{5}}{5}$

step 3

Find tan(B)

we know that

$tan(B)=\frac{AC}{BC}$ ----> by TOA (opposite side divided by adjacent side)

substitute the values

$tan(B)=\frac{8}{4}=2$

step 4

Find sec(A)

we know that

$sec(A)=\frac{1}{cos(A)}$

$cos(A)=\frac{AC}{AB}$ ----> by CAH

$sec(A)=\frac{AB}{AC}$

substitute the values

$sec(A)=\frac{4\sqrt{5}}{8}$

simplify

$sec(A)=\frac{\sqrt{5}}{2}$

3 0

4 years ago

Help me please there is really not much you need to know it’s all here

iren2701 [21]

The equation for a 180 degree angle is

(X,Y) - (-x,-y) so the original is at (2,4)(4,4)(2,6)(4,6) so you would Change them all to negatives (-2,-4)(-4,-4)(-2,-6)(-4,-6) so plot those then move it over to the left 3 units then up 7 and that’s your final answer

7 0

4 years ago

WILL MARK BRANLIEST ASAP PLZ!<br> Find n. <br> 5/6= 15/n

yanalaym [24]

Answer:

Step-by-step explanation:

Step 1. 5/6

step2. times 3

step 4. 15/18

8 0

3 years ago

Combine like terms to create an equivalent expression. Enter coefficients as simplified proper or improper fractions or integers

Art [367]

Answer:

Step-by-step explanation:

The first (and only step) is to remove the brackets.

-1/2 * - 3y = 3/2y Two minus make a plus

-1/2 * 10 = - 5

Answer: 3/2 y - 5

8 0

3 years ago

Domain and range and function or not​

Domain and range and function or not