Find the range of the function y=-5x-7

QUESTION POSTED AT 20/02/2020 - 10:50 PM

Answered by admin AT 20/02/2020 - 10:50 PM

Range is how far up or down the garph can go
basically the limits of y

find min and max of y

basically find the biggestor smallest the x can get to influence y
confusing sorry
when x is an even number, that number is still negative


so make that number as small as possible
if x=(big number that is negative)
we get -1/(5^(big number)) which basically makes it nigligible or almost 0

y=-7 is max


when x=big number (positive) we get very negative number

so range is from negative infinity to -7
basically y<-7
we choose < and not ≤ because the -5ˣ will never dissapear, it will just be very, very small


y<-7 is answer
Post your answer

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ANSWERED AT 30/03/2020 - 01:37 AM


QUESTION POSTED AT 30/03/2020 - 01:37 AM

Consider the vector v=(-7,8). What is the angle between v=(-7,8) and the positive x-axis? Part 1: Use the formula v1 x v2=|v1||v2|cos theta to find the cosine of the angle between the two vectors (-7,8) and (1,0).

(1) To find the angle between v and positive x-axis, we first determine the angle formed by v and the negative x-axis. Since v = (-7,8), its vertical measure y is 8 units and horizontal measure x is 7 units.

arctan(8/7) = 48.81°
Solving for angle between v and positive x-axis:
180° - 48.81° = 131.19°

(2) v1 x v2=|v1||v2|cosθ
Calculating for the dot product of the vector:
v1 x v2 = -7*1 + 8*0 = -7
Calculating vector magnitude:
|v1| = √(-7²+8²) = √113
|v2| = √(1²+0²) =1

cosθ = (v1 x v2) /|v1||v2| = -7/(√113 *1) = -0.659

ANSWERED AT 30/03/2020 - 01:28 AM


QUESTION POSTED AT 30/03/2020 - 01:28 AM

Graph this linear function using slope intercept: y=2x+9

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ANSWERED AT 29/03/2020 - 11:47 PM


QUESTION POSTED AT 29/03/2020 - 11:47 PM

Help me start finding the angle measures

A=60
B=30
C=60
D=120
E=60
F=60

ANSWERED AT 29/03/2020 - 06:35 PM


QUESTION POSTED AT 29/03/2020 - 06:35 PM

Find the area and peri19.6 ft13 ftA

The area is 38 because whenever you have to find the area in an equation you always add up the total sides. The shape is a rectangle and the only numbers they give is 6 and 13 obviously the sides are equal so the opposite side of 13 is 13 and the opposite side of 6 is 6 because they're both a certain length. In total you add up all the sides 13 plus 13 is 26, 6 plus 6 is 12 , 26 plus 12 is 38

The perimeter is 78 because they only give you two number so whenever you do a perimeter in an equation you always have to remember to multiply. 13 multiplied by 6 is 78. Hope this helped ( :

ANSWERED AT 29/03/2020 - 06:34 PM


QUESTION POSTED AT 29/03/2020 - 06:34 PM

Box and whisker plot how do you find the percentage of students above an 80%

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ANSWERED AT 29/03/2020 - 06:34 PM


QUESTION POSTED AT 29/03/2020 - 06:34 PM

40 + 20 + 10 + … ; n = 10 Find the sum of each finite geometric series.

I've attached a picture below of the formula for a finite geometric sequence. It includes an infinite geometric sequence formula for your reference, too.

a_1 = 40
r(ratio)= \frac{1}{2}
n=10

Plug in the values. 

S_{10}=40*( \frac{1- \frac{1}{2}^{10} }{1- \frac{1}{2} } )
S_{10}=40*( \frac{1- \frac{1}{1024} }{\frac{1}{2} })
S_{10}=40*( \frac{\frac{1023}{1024} }{\frac{1}{2} })
S_{10}=40*1.998046875
 S_{10} = 79.921875
S₁₀ ≈ 79.92

ANSWERED AT 29/03/2020 - 06:31 PM


QUESTION POSTED AT 29/03/2020 - 06:31 PM

Given the function: f(x) = 2x2 - 3x + 8, find f(-2). A) -22 B) -11 C) 11 D) 22

Answer:

the answer is D (22)


Step-by-step explanation:


ANSWERED AT 29/03/2020 - 06:31 PM


QUESTION POSTED AT 29/03/2020 - 06:31 PM

What is the interquartile Range for the following data set? {5,6,7,3,9,8,3,1,6,7,7}

To find the interquartile range of the data, you get both quartile one (1) and two (2) and subtract the larger number from the lower number.

Q3 - Q1 = Interquartile range

Your answer, in turn, would be... 
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ANSWERED AT 29/03/2020 - 06:30 PM


QUESTION POSTED AT 29/03/2020 - 06:30 PM

I need help to find the cost of shirts and how much I bought?

If 2 is 25 then 1 is 12.5
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ANSWERED AT 29/03/2020 - 06:30 PM


QUESTION POSTED AT 29/03/2020 - 06:30 PM

Find the distance between the points with coordinates (-8.6,2.9) and (8.6,2.9)

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ANSWERED AT 29/03/2020 - 06:24 PM


QUESTION POSTED AT 29/03/2020 - 06:24 PM

For a circle with a radius of 6 feet, find the arc length of a central angle of 6 degrees. A. 36nft B. 3/5 pi ft C. 2/5 pi ft D. 1/5 pi ft

Arc length = angle*radius
Degrees to radians: multiply by pi/180
Arc length = (pi/180*6)*6 = 36/180*pi = pi/5.

The answer is D.

ANSWERED AT 29/03/2020 - 06:20 PM


QUESTION POSTED AT 29/03/2020 - 06:20 PM

How do you find the area ? Do you just multiply the two ?

Yes, you multiply the two. Then divide it by 2

ANSWERED AT 29/03/2020 - 06:14 PM


QUESTION POSTED AT 29/03/2020 - 06:14 PM

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ANSWERED AT 29/03/2020 - 04:33 PM


QUESTION POSTED AT 29/03/2020 - 04:33 PM

For the function f(x) = –5x, which ordered pair will be a point on the graph of the function? A. (–5, 1) B. (2, 10) C. (15, –3) D. (0, 0)

It's D: (0,0)
This is because when you put 0 in for x your y value will equal 0 and that is one of your answers, so it's the point (0,0) 

ANSWERED AT 28/03/2020 - 07:19 PM


QUESTION POSTED AT 28/03/2020 - 07:19 PM

Which graph represents the function y=1/2x+4 1/2-3

No graphs are shown......

ANSWERED AT 28/03/2020 - 12:59 PM


QUESTION POSTED AT 28/03/2020 - 12:59 PM

Given points A(4,5) and B(-4,11). Find the distance AB to the nearest tenth.

If A(x', y') & B(x",y") the the distance AB is given by the following formula:

AB =√[(x"-x')² + (y"-y')²]

Plug into the above with A(4,5) and B(-4,11).

AB =√[(-4-4)²+(11-5)²] =√(-8)²+(6)² = √(64) + (36) =√100 = 10

ANSWERED AT 28/03/2020 - 12:55 PM


QUESTION POSTED AT 28/03/2020 - 12:55 PM

One of the angles of a parallelogram is equal to 40°. Find the rest of the angles.

Is there some type of image for this?

ANSWERED AT 28/03/2020 - 12:55 PM


QUESTION POSTED AT 28/03/2020 - 12:55 PM

How can you use a scatter plot to find a trend line

It helps you determine the characteristics of the plot/graph. I am not sure so it is your choose.

ANSWERED AT 28/03/2020 - 12:54 PM


QUESTION POSTED AT 28/03/2020 - 12:54 PM

What is the effect on the graph of the function f(x) = 2x when f(x) is changed to f(3x)? A) vertical stretching B) vertical compression C) horizontal compression D) horizontal stretching

Answer:

C)  Horizontal compression

Step-by-step explanation:

Since, if y = f(x) is a function,

Then y = a f(x) gives a vertical stretch if a > 1 and gives a vertical compression if 0 < a < 1.

Also, y = f(bx) gives a horizontal stretch when 0 < b < 1 and gives a horizontal compression if b > 1.

Here,

The given parent function is,

f(x) = 2x

And, 3 > 1

Thus, by the above statements,

f(3x) will give a horizontal compression.

Hence, Option C is correct.

ANSWERED AT 28/03/2020 - 12:51 PM


QUESTION POSTED AT 28/03/2020 - 12:51 PM

How do you graph the quadratic function 8(x-6)^2

8 translation: narrow or compress graph by a scale factor of 8
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ANSWERED AT 28/03/2020 - 12:49 PM


QUESTION POSTED AT 28/03/2020 - 12:49 PM

(A) How many total dinners are included in the histogram? (B) What is the most popular price range of the dinners?

There are ten (10) total dinners included in this histogram.

The most popular price range is fifteen to thirty dollars and thirty to forty-five dollars.

ANSWERED AT 28/03/2020 - 12:45 PM


QUESTION POSTED AT 28/03/2020 - 12:45 PM

Find 3 solutions of the equation y=9×-4

Three solutions are: (2,14) (1,5) (3, 23)

ANSWERED AT 28/03/2020 - 12:44 PM


QUESTION POSTED AT 28/03/2020 - 12:44 PM

I'm doing something in math, and I need to find out how many people live in one of these states, or both of them. 1 in past the other now, etc. The two states that I chose are Florida and Georgia. I have to do this on a popular site.

Http://worldpopulationreview.com/states/florida-population/
http://worldpopulationreview.com/states/georgia-population/

ANSWERED AT 28/03/2020 - 12:42 PM


QUESTION POSTED AT 28/03/2020 - 12:42 PM

What is the interquartile range this data? 5, 8, 13, 17,

The interquartile range answer is 8.5

ANSWERED AT 28/03/2020 - 12:40 PM


QUESTION POSTED AT 28/03/2020 - 12:40 PM

The data shows the number of grams of fat found in 9 different health bars. 11, 11.5, 10.5, 17, 14.5, 14.5, 18, 17, 19 What is the IQR (interquartile range) for the data? a. 6.25 b.7 c.14.5 d.17.5

Answer:

Option A. 6.25

Step-by-step explanation:

The data shows the number of grams of fat found in different health bars is

11, 11.5, 10.5, 17, 14.5, 14.5, 18, 17, 19

Now we will arrange the data in ascending order

10.5, 11, 11.5, 14.5, 14.5, 17, 17, 18, 19

Middle of the numbers is 14.5 which is median of the data.

We know IQR = Median of first quartile - median of second quartile

Median of first quartile = \frac{1}{2}(11+11.5)=11.25

And median of second quartile = \frac{1}{2}(17+18)=\frac{35}{2}=17.5

Now IQR = 17.5 - 11.25 = 6.25

Therefore Option A 6.25 is the correct option.

ANSWERED AT 28/03/2020 - 12:38 PM


QUESTION POSTED AT 28/03/2020 - 12:38 PM

Find the quotient........

Its a negative number dude

ANSWERED AT 28/03/2020 - 12:36 PM


QUESTION POSTED AT 28/03/2020 - 12:36 PM

HELP ASAP PLEASE BRAINLEST ANSWER !!! In two or more complete sentences, compare the number of x-intercepts in the graph of f(x) = x2 to the number of x-intercepts in the graph of g(x) = -x2 +7. Be sure to include the transformations that occurred between the parent function f(x) and its image g(x).

Answer:

The function started facing up with a vertex at (0,0) since 7 was added before squaring , the graph shifts 7 units up so the vertex at (7,0) also , the function is negative do the graph is pointing down.


This means that there are two x- intercepts in g(x) and there was one x- intercepts in f(x).

ANSWERED AT 28/03/2020 - 12:34 PM


QUESTION POSTED AT 28/03/2020 - 12:34 PM

Quadrilateral ABCD is a parallelogram with AB = 3y – 6, BC = 5x – 8, CD = 2y + 4, and AD = 4x –1. Find x. A. 7 B. 14 C. 27 D. 28

Choice A. Work done below:
4x-1=5x-8 ( Set the opposite sides equal to each other).
4x-5x-1=-8 (Subtract 5x on both sides)
-x-1=-8 (Combine like terms)
-x=-8+1( Add 1 on both sides)
-x=-7 (Now since you have a negative sign on both sides you can cancel them)
x=7 ( Making that as your answer!!)

ANSWERED AT 28/03/2020 - 12:33 PM


QUESTION POSTED AT 28/03/2020 - 12:33 PM