All categories

3 years ago

Which of the following are equivalent to the function y = 4cos x - 2? Check all that apply.

2 answers:

8 0

The answer is
D. y = 4cos(-x) - 2
proof
cosine is an even function, it means cos(-x) = cosx
so y = 4cos(-x) - 2 = y = 4cos(x) - 2

valina [46]3 years ago

6 0

Answer:

According to Apex, the answer is B and D.

Step-by-step explanation:

You might be interested in

A spinner is divided into three equal sections labeled a B and C. Erik spins the spinner and rolls a fair number cube. The tree

ale4655 [162]

Answer:

Last one:

The probability of the spinner not landing on A and rolling a prime number is 1/3

Step-by-step explanation:

The probability of the spinner not landing on A: 2/3

Prime outcomes on a dice:

2, 3, 5

The probability of rolling a prime number: 3/6 = 1/2

The probability of the spinner not landing on A and rolling a prime number is:

2/3 × 1/2

1/3

7 0

3 years ago

Read 2 more answers

Find an example of a 2 dimensional object in your house that is rectangular or triangular.

Dmitry_Shevchenko [17]

Answer:

A = 216 cm^2

P = 80 cm

Step-by-step explanation:

l = 12

w = 18

As the object is rectangular, the area is height * width and the perimeter is

2(height + width) as there are two of each side.

12 * 18 = 216 U^2 U = unit of measurement, I would presume for a poster you use cm so its 216 cm^2

12 + 18 = 40

40 * 2 = 80 cm

6 0

3 years ago

PLEASE HELPPPP, Graph the equations using slope intercept form. y = -3x + 8

Zolol [24]

Answer:

Slope = -3

y- intercept= (0,8)

x : 0, 8/3

y : 8, 0

8 0

3 years ago

The linear function f i with values f(-1) = 10 and f(5) = -1 is f(x)

zhenek [66]

Answer:

Use the two points to compute the slope, m, then use one of the points in the form y=m(x)+b to find the value of b.

Explanation:

The equation for the slope, m, of a line is:

m=y1−y0x1−x0 [1]

The equation f(2)=−1 tells us that x0=2andy0=−1; substitute this into equation [1]:

m=y1−−1x1−2 [2]

The equation f(5)=4 tells us that x1=5andy1=4; substitute this into equation [2]:

m=4−−15−2 [3]

m=53

Substitute 53 for m into the equation y=m(x)+b

y=53x+b [4]

Substitute 2 for x and -1 for y and the solve for b:

−1=53(2)+b

b=−133

Substitute −133 for b in equation [4]:

y=53x−133 [5]

Check:

−1=53(2)−133
4=53(5)−133

−1=−1
4=4

Hope this helps

3 0

3 years ago

(TEN POINTS)

Rainbow [258]

F(-1)= -3 is (-1,-3) and f(2) = 6 is (2,6) where f(x) = y
y=mx + b is the slope-intercept form whereas m equals the slope (rate of change) and b equals the y-intercept (initial amount/what y is when x is 0.)

First, we need to find the slope between the two points (-1,-3) and (2,6). To find the slope we could use one of it's formulas $\frac{y^2 - y^1}{x^2 - x^1}$ .
1. (-1,-3)
2. (2,6)
$\frac{6 - -3}{2 - -1}$ → $\frac{9}{3}$ → $\frac{3}{1}$

The slope is 3 ( $\frac{3}{1}$ ). Thusly, y = 3x + b

To find out the y-intercept, we can reverse the slope. [Note: This $\frac{3}{1}$ is in $\frac{rise}{run}$ where rise is 'y' and run is 'x'. Reversed would be $\frac{-3}{-1}$ ]. Take the second ordered pair and use our reversed slope on it until we get 0 for x.

(2, 6) ⇒ (2 - 1, 6 -3) ⇒ (1, 3) ⇒ (0,0)

Y-intercept is 0. Therefore, y= 3x + 0 [NOTE: y = f(x), so if you want it in function notation form it's just f(x) = 3x + 0.]

6 0

3 years ago