All categories

3 years ago

To three decimal places, find the value of the first positive x-intercept for the function f(x) = -2cos(x + 1). (6 points)

Mathematics

1 answer:

djverab [1.8K]3 years ago

7 0

I'm not 100% sure about this because this unit confused me but...

if you put it in your graphing calculator or in desmos, you can see that the first positive x -intercept (which is a point that is on the x-axis) is somewhere around one but it's not 1.571!! (other person is wrong!)

that point is (0.571, 0) so it's the first option

You might be interested in

Show that x + y : x - y= 3 : 2

insens350 [35]

Answer:

x + y : x - y = (5/2+1/2) : (5/2-1/2)

x + y : x - y = 3 : 2

Therefore, x + y : x - y= 3 : 2 is proved.

Step-by-step explanation:

Given

x + y : x - y = 3 : 2

$x + y = 3$

$x - y = 2$

Solving to find x and y

$\begin{bmatrix}x+y=3\\ x-y=2\end{bmatrix}$

$x-y=2$

$-$

$\underline{x+y=3}$

$-2y=-1$

$\begin{bmatrix}x+y=3\\ -2y=-1\end{bmatrix}$

solve for y

$-2y=-1$

Divide both sides by 2

$\frac{-2y}{-2}=\frac{-1}{-2}$

$y=\frac{1}{2}$

$\mathrm{For\:}x+y=3\mathrm{\:plug\:in\:}y=\frac{1}{2}$

$x+\frac{1}{2}=3$

$x+\frac{1}{2}-\frac{1}{2}=3-\frac{1}{2}$

$x=\frac{5}{2}$

$x=\frac{5}{2},\:y=\frac{1}{2}$

Thus,

x + y : x - y = (5/2+1/2) : (5/2-1/2)

x + y : x - y = 3 : 2

Therefore, x + y : x - y= 3 : 2 is proved.

7 0

3 years ago

PLZZ HELP URGENT!!! In a fruit cocktail, for every 25 ml of orange juice you need 30 ml of apple juice and 45 ml of coconut milk

daser333 [38]

The proportion of the cocktail is 2/3

8 0

3 years ago

Read 2 more answers

Plastic storage bins are designed so they can be nested. Four 10-gallon bins stacked together measure 26 inches high, and 9 stac

bixtya [17]

First, you need to know the coordinates of the points:

If x is 9 stacked bins to the y of 41 inches, the first point is (9,41)
From there, you can determine the other point: (4,26)

Find the slope by subtraction using the formula: y2-y1/x2-x1

(41-26)/(9-4)
15/5
slope is 3

y=3x+b

To find b, substitute one point into the equation. I will use (4,26)

26=3(4)+b
26=12+b
-12 -12

b=14

Your final equation is:
y=3x + 14

6 0

3 years ago

Which represents "The shape is a rhombus if and only if the diagonals are perpendicular and the sides are congruent"?

Fofino [41]

Answer:

True

Step-by-step explanation:

4 0

4 years ago

Read 2 more answers

On Monday, more than 500 people attended a county fair. Fourteen of the people who attended the fair that day were selected at r

Elena-2011 [213]

3 was the mode of the number of rides the people went that day because it appeared 3 times than the other numbers 0,1, and 2 which appeared only 2 times in the chart
Hope this helps!:)

5 0

3 years ago

Read 2 more answers