What is the sum?

StartFraction 3 Over x squared minus 9 EndFraction + StartFraction 5 Over x + 3 EndFraction
StartFraction 8 Over x squared + x minus 6 EndFraction
StartFraction 5 x minus 12 Over x minus 3 EndFraction
StartFraction negative 5 x Over (x + 3) (x minus 3) EndFraction
StartFraction 5 x minus 12 Over (x + 3) (x minus 3)

Answer:

  θ = {0, π/2, π, 3π/2, 2π} . . . . choice B

Step-by-step explanation:

In this equation, r will be a maximum where cos(4θ) is a maximum. That is where ...

  4θ = 2kπ . . . . for some integer k

Dividing by 4 gives ...

  θ = k(π/2)

  θ = {0, π/2, π, 3π/2, 2π} . . . . matches choice B

__

You will note that the graph also has extremes at odd multiples of π/4. These are the locations where cosine is a minimum and r is negative. It can be argued that r is not a maximum at those points.

Answer:

Part A. I chose points (7,1.3) and (48,9.8)

Part B. a. Positive correlation; b.  y = 0.21x - 0.2

Step-by-step explanation:

Part A.

I chose the first and last points on the line — (7 in, 1.3 lb) and (48 in, 9.8 lb).

That put three points on the line, three above it, and four below.

Part B

a. Type of correlation

There is a positive correlation between the length of a puppy and its weight.

You would expect a longer dog to be bigger and weigh more than a shorter dog.

b.  The equation for the line of best fit

The slope-intercept equation for a straight line is

y = mx + b

where m is the slope of the line and b is the y-intercept.

The line passes through the points (7,1.3) and (48, 9.8).

(i) Calculate the slope of the line

\begin{array}{rcl}

[tex]m & = & \dfrac{y_{2} - y_{1}}{x_{2} - x_{1}}\\\\ & = & \dfrac{9.8 - 1.3}{48-9}\\\\& = & \dfrac{8.5}{41}\\\\& = & \textbf{0.21 lb/in}\\\\\end{array}[/tex]

The slope of the line is 0.21 lb/in.

(ii) Locate the y-intercept

Put the slope and the coordinates of one point into the slope-intercept formula.

[tex]\begin{array}{rcl}y & = & mx + b\\1.3 & = & 0.21\times7 + b\\1.3 & = & 1.47 + b\\b & = & -0.2\\\end{array}[/tex]

The y-intercept is at (0,-0.2)

(iii) Write the equation for the line

y = 0.21x - 0.2

Answer:

False

True

False

True

Step-by-step explanation:

Easiest and fastest way is to plug each equation into a calc and see if they match the values given. When you do so, you should get your answers.

Answer:

First investment = $3100

Other investment =  $3600

Step-by-step explanation:

Total investment made by Henry = $6700

Let one investment be x,

Then other investment = total investment - first investment = 6700 - x

A) For 8% interest, investment = x

dollar value of 8% investment = 8/100*x= 8x/100

A) For 5% interest, investment = 6700- x

dollar value of 8% investment = 5/100*(6700- x)= 5(6700- x)/100

Total return on both the investment =  8x/100 + 5(6700- x)/100

  = (8x +33500 - 5x)/100 = (3x+33500)/100

Given that total return = 428

Therefore,

(3x+33500)/100 = 428

=>  3x+33500 = 428*100 = 42800

=> 3x = 42800- 33500 = 9300

=> x = 9300/3 = 3100

Thus, first investment = x = $3100

other investment =  $(6700 - 3100) = $3600

Answer:

→VU

→TU

Step-by-step explanation:

→ stands for "ray" these sides are rays that form ∠VUT

Answer:

B

Step-by-step explanation:

The range is all values of y. Y goes from -1 to 1. Please mark brainliest.

Answer:

see below

Step-by-step explanation:

The domain of the function is the possible x values

The domain is all real values since x can be any number

The range of the function is the possible y value

The values of y go from -1 to 1 so

-1 ≤y≤1

Answer:

Step-by-step explanation:

t=V100-50/4

t=V50/4=1.76≈1.8 s

when h=0

t=V100/4=10/4=2.5 s

Answer:  a) (5√2)/4 ≈ 1.77 seconds

               b) 5/2 = 2.5 seconds

Step-by-step explanation:

[tex]t=\dfrac{\sqrt{100-h}}{4}\\\\\\h=50\rightarrow t=\dfrac{\sqrt{100-50}}{4}\\\\\\.\qquad \qquad =\dfrac{\sqrt{50}}{4}\\\\\\.\qquad \qquad =\large\boxed{\dfrac{5\sqrt2}{4}}\\\\\\\\h=0\rightarrow t=\dfrac{\sqrt{100-0}}{4}\\\\\\.\qquad \qquad =\dfrac{\sqrt{100}}{4}\\\\\\.\qquad \qquad =\dfrac{{10}}{4}\\\\\\.\qquad \qquad =\large\boxed{\dfrac{5}{2}}[/tex]

Answer:

2m-9

Step-by-step explanation:

m-4+m-5

=m+m-4-5

=2m-9

Answer:

2m-9

Step-by-step explanation:

m-4+m-5

take the like terms

= 2m-4-5

= 2m-9

Sorry if that didn't help

Answer:

We need to remember that the Z value comes froma normal standard distribution given by:

[tex] Z\sim N(\mu=0,\sigma=1)[/tex]

So then the mean is 0 and all the values in the left are negative. So then if we want to analyze that if A is negative then  value of Z indicates that :

B. the number of standard deviations of an observation is to the left of the mean

Step-by-step explanation:

We need to remember that the Z value comes froma normal standard distribution given by:

[tex] Z\sim N(\mu=0,\sigma=1)[/tex]

And the z score formula is given by:

[tex]z=\frac{X -\mu}{\sigma}[/tex]

So then the mean is 0 and all the values in the left are negative. So then if we want to analyze that if A is negative then  value of Z indicates that :

B. the number of standard deviations of an observation is to the left of the mean

B. the number of standard deviations of an observation is to the left of the mean

A [tex]Z[/tex] score is a numerical measurement that describes a value's relationship to the mean of a group of values. The value of the [tex]Z[/tex] score tells you how many standard deviations you are away from the mean. A negative [tex]Z[/tex] score reveals the raw score is below the mean average. Also, a negative value of Z indicates that B. the number of standard deviations of an observation is to the left of the mean

For more information:

https://brainly.com/question/17756962?referrer=searchResults

Answer:

Height = 8 yards, base = 15 yards.

Step-by-step explanation:

Let the height be x yards then the base = x+7 yards.

Area  = 1/2 * base * height, so:

1/2 * (x+7) * x = 60

1/2x(x + 7) = 60     Multiply through by 2:

x(x + 7) = 120

x^2 + 7x - 120 = 0

(x - 8)(x +15) = 0

x = 8, -15

x = 8. ( we ignore the negative root).

So the base is 8+7 = 15 yards long.

Answer:

The probability is 40%

Step-by-step explanation:

a) There are ten pieces of paper with ten numbers

Probability of selecting four pieces of paper = 4/10 or 40%

Probability that the four numbers selected will have a sum greater than 82 = 82/205 = 40%

Therefore, the probability of selecting four numbers that have a sum greater than 82 out of ten numbers totalling 205 is 40%.

b) Probability is the ratio of the number of outcomes favourable for the event to the total number of possible outcomes.   In other words, it is a measure of the likelihood of an event (or measure of chance).

Answer:

Graphed below.

Step-by-step explanation:

The slope of the line is -1/3.

The y-intercept is at (0, 2).

The x-intercept is at (6, 0).

Answer:

[tex]y=3t^9+C[/tex]

Step-by-step explanation:

Given:  [tex]\dfrac{dy}{dt}=27t^8[/tex]

We want to obtain the general solution of the given differential equation.

[tex]dy=27t^8$ dt\\$Take the integral of both sides\\\int dy =\int 27t^8$ dt$\\y=\dfrac{27t^{8+1}}{8+1} +C$, (where C is the constant of integration)$\\y=\dfrac{27t^{9}}{9} +C\\\\y=3t^9+C[/tex]

The general solution of the differential equation is: [tex]y=3t^9+C[/tex]

CHECK:

[tex]\dfrac{d}{dt} y=\dfrac{d}{dt}(3t^9+C)=\dfrac{d}{dt}(3t^9)+\dfrac{d}{dt}(C)\\\\\text{Since derivative of a constant is zero}\\\\\dfrac{dy}{dt}=27t^{9-1}\\\dfrac{dy}{dt}=27t^8[/tex]

Answer:

70% i believe.

Step-by-step explanation:

Answer:

solution,

[tex]a. \: \: \frac{3x + 4}{2} = 9.5 \\ \: \: or \: 3x + 4 = 9.5 \times 2(cross \: multiplication) \\ \: \: or \: 3x + 4 = 19 \\ \: \: or \: 3x = 19 - 4 \\ \: \: or \: 3x = 15 \\ \: or \: x = \frac{15}{3} \\ \: x = 5[/tex]

[tex]b. \: \: \frac{7 + 2x}{3} = 5 \\ \: \: or \: 7 + 2x = 5 \times 3(cross \: multiplication) \\ \: \: or \: 7 + 2x = 15 \\ \: \: or \: 2x = 15 - 7 \\ \: or \: 2x = 8 \\ \: or \: x = \frac{8}{2} \\ \: \: x = 4[/tex]

Hope this helps..

Good luck on your assignment..

Answer:

so the coordinates of mid-point of AC are (a/2,a/2)

Step-by-step explanation:

as the mid-point of AC is the same as the mid-point of BD

SO we will find the mid-point of BD

by using mid-point formula

[tex]M(x,y)=(\frac{x1+x2}{2} ,\frac{y1+y2}{2})\\M(x.y)=(\frac{0+a}{2},\frac{a+0}{2})\\ M(x,y)=(\frac{a}{2},\frac{a}{2})[/tex]

i hope this will help you :)

Answer:

27°

Step-by-step explanation:

Let line AB be extended to touch line DC at point F, thereby forming triangle BCF.

∠ABC + ∠BCE = 180° (sum of interior angles in a transversal).

∠ABC + 48 = 180

∠ABC = 180 - 48 = 132°

Also in triangle ADF, ∠ADF + ∠DFA + ∠FAD = 180 (sum of angle in a straight line)

85 + ∠DFA + 25 = 180

∠DFA + 110 = 180

∠DFA = 180 - 110 = 70

∠DFA = 70

∠DFA + ∠BFC = 180° (sum of angle on a straight line)

∠BFC + 70 = 180

∠BFC = 180-70 = 110

∠BFC = 110°

∠ABC + ∠CBF = 180° (sum of angle on a straight line)

132 + ∠CBF = 180

∠CBF = 1800 - 132 = 42

∠CBF = 42°

In triangle BCF:

∠BFC + ∠CBF + x = 180° (sum of angle in a triangle)

42 + 110 + x = 180

x + 152 = 180

x = 180 - 152

x = 27°

Answer:

22 Degrees

Step-by-step explanation:

First, i extended the line AB, to make a triangle and then i found out that the angle is 70 degrees, and from that i got that the other angle is 110 degrees, so now i know that the triangle (that has X in it) is this formula:

110+48+X=180

so now 180-158=22, so that is the answer

Answer: the answer 5

Step-by-step explanation: it is 5

Answer:

its 5

Step-by-step explanation:

Answer:

I tried the question and I got. a/4-b/2-5/2

Step-by-step explanation:

I hope this helps

Answer:

900.

Step-by-step explanation:

66 tens are 660.

and 24 tens are 240.

so, It is 900!

Answer:

b)4feet

Step-by-step explanation:

In a rectangle two sides are equal.

Perimeter is the distance around the rectangle thus.

length=24-8-4-8

length=4

Answer:

Answer:

M(3,2)

Step-by-step explanation:

270 = (y,-x)

(3,2)=(2,-3)

Step-by-step explanation:

Answer:

Also N(3, 1)

Step-by-step explanation:

Answer:

x+50degree =180 (sum of co- interior angle)

x=180-50degree

x=130answer

Answer:

12.5%

Step-by-step explanation:

There is only one number 5 from a total of 8 parts.

1 out of 8.

1/8 = 0.125

P(5) = 12.5%

Answer:

12.5%

Step-by-step explanation:

Spinner divided in parts = 8

Number 5 = 1

P(5) = 12.5%

Answer:

Pencil = $0.25

Marker = $1.00

Eraser = $1.75

Step-by-step explanation:

Let P denote pencils, M denote markers and E denote erasers. The quantities of each item and total amounts spent by each person can be modeled into the following linear system:

[tex]7P+8M+7E=22\\4P+8M+6E=19.5\\6P+4M+7E=17.75[/tex]

Solving the linear system:

[tex]7P-4P+8M-8M+7E-6E=22-19.5\\3P+E=2.5\\E=2.5-3P \\\\7P+8M+7E-2*(6P+4M+7E)=22-2*17.75\\-5P-7E=-13.5\\-5P*-7*(2.5-3P)=-13.5\\16P=-13.5+17.5\\P=0.25\\E=2.5-0.25*3\\E=1.75\\7P+8M+7E =22\\7*0.25+8M+7*1.75 =22\\8M=8\\M=1[/tex]

The price of each item is:

Pencil = $0.25

Marker = $1.00

Eraser = $1.75

Answer:

A.

Step-by-step explanation:

Since you are trying to find x, you have to divide both sides by 4 to isolate x and get your answer.

Answer:

3

Step-by-step explanation:

=> 5 x (8-4) ÷ 4 - 2

Solving Brackets

=> 5 × 4 ÷ 4 - 2

Dividing

=> 5 × 1 - 2

Multiplying

=> 5 - 2

Subtracting

=> 3

Answer:

3

Step-by-step explanation:

5 x 4/4-2

5x1-2 (any expression divided by itself equals one)

5-2 (any expression multiplied by one remains the same)

=3

hope this helps love!

Answer:

KL = 17.32

Step-by-step explanation:

[tex]KL^{2} = (ML)(JL)\\KL^{2} = (15)(20)\\KL^{2} = 300\\\sqrt{KL^{2} } = \sqrt{300} \\KL = 17.32[/tex]

Answer:

B. 533in²

Step-by-step explanation:

Step 1: Find the area of the rectangle

A = lw

A = (29)13

A = 377

Step 2: Find the leg of the triangle

13 + 11 = 24

Step 3: Find the area of the triangle

A = 1/2bh

A = 1/2(24)(13)

A = 12(13)

A = 156

Step 3: Add the areas of the 2 figures together

377 + 156 = 533

Answer:

137

Step-by-step explanation:

sum of angle in a circle = 360°

105 + 118 + x = 360

223 + x = 360

x = 360 - 223

x = 137