Grade 11 Functions - Struggling to answer this question in full, please help me by providing an answer.
The cost, c(x) in dollars in per hour of running a certain fishing boat is modeled by the function c(x)= 0.9x^2 - 18.1x + 135.1, where x is the speed in km/hour/ At what approximate speed should the boat travel to achieve minimum cost?

Answer: We can see that it has a parabola for its graph, so we can say that f(x) is a quadratic function. This means that f(x) has a parent function of y = x2.

Step-by-step explanation:

(Hope this helped Btw not mine)

Answer:

Absolute value parent function

Step-by-step explanation:

Step-by-step explanation:

[tex]from \: boyle 's \: law \\ P _{1}V _{1} = P _{2} V _{2} \\ (4 \times 20) = (P _{2} \times 5) \\ P _{2} = \frac{(4 \times 20)}{5} \\ P _{2} = 16 \: atm[/tex]

Answer:

A = $4,035.13

Step-by-step explanation:

Given: 380 earns, 128.25 in 7 years and 6 months

To find: The rate percent per annum

Formula: [tex]A = P(1 + rt)[/tex]

Solution: I = A - P = $3,655.13

Equation:

A = P(1 + rt)

First, converting R percent to r a decimal

r = R/100 = 128.25%/100 = 1.2825 per year.

Solving our equation:

A = 380(1 + (1.2825 × 7.5)) = 4035.125

A = $4,035.13

The total amount accrued, principal plus interest, from simple interest on a principal of $380.00 at a rate of 128.25% per year for 7.5 years is $4,035.13.

Answer:

CA=P+2Q

Step-by-step explanation:

Answer:

356.93sq. cm

Step-by-step explanation:

Area of the composite figure = Area of rectangle + Area of semicircle

Area of rectangle = length * wiidth

Area of rectangle =  14cm * 20cm

Area of rectangle = 280 sq. cm

Area of semicircle = πr²/2

Area of semicircle = 3.14(7²)/2

Area of semicircle  = 3.14 * 49/2

Area of semicircle  = 76.93 sq. cm

Hence the area of the figure = 280 + 76.93

Hence the area of the figure = 356.93sq. cm

Answer:

i think its like:

see that middle angle there, thats a 90° angle and straight linea measure 180°. so add 90 + 21 and subtract from 180

Answer:

wha- I have no idea what your saying

Answer: 5

Step-by-step explanation:

Given

The length of a side is [tex]x+3\ cm[/tex]

The height of a triangle is [tex]2x-5\ cm[/tex]

Area of triangle is [tex]20\ cm^2[/tex]

Area of triangle is given by

[tex]\Rightarrow A=\dfrac{1}{2}\times \text{base}\times \text{height}[/tex]

[tex]\Rightarrow A=\dfrac{1}{2}\times (x+3)\times (2x-5)\\\\\Rightarrow 40=(x+3)\times (2x-5)\\\Rightarrow 2x^2+x-55=0\\\\\Rightarrow x=\dfrac{-1\pm \sqrt{1^2-4(2)(-55)}}{2(2)}\\\\\Rightarrow x=\dfrac{-1\pm 21}{4}\\\\\Rightarrow x=-5.5,5[/tex]

Neglecting negative value

Therefore, the value of x is 5.

[tex]\\ \tt\longmapsto 132\pi=A4[/tex]

[tex]\\ \tt\longmapsto A=\dfrac{132\pi}{4}[/tex]

[tex]\\ \tt\longmapsto A=33\pi[/tex]

Answer:

[tex]x=\frac{1+\sqrt{31}}{2},\:x=\frac{1-\sqrt{31}}{2}[/tex]

Step-by-step explanation:

[tex]-> 0=2x^2-2x-15[/tex]

-zeros means the solution aka x intercept, meaning y=0

[tex]x_{1,\:2}=\frac{-\left(-2\right)\pm \sqrt{\left(-2\right)^2-4\cdot \:2\left(-15\right)}}{2\cdot \:2}[/tex]

=> according to quadratic formula

[tex]x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}[/tex]

where [tex]ax^2+bx+c=0[/tex]

=> [tex]x_{1,\:2}=\frac{-\left(-2\right)\pm \:2\sqrt{31}}{2\cdot \:2}[/tex]

simplify

[tex]x_1=\frac{-\left(-2\right)+2\sqrt{31}}{2\cdot \:2},\:x_2=\frac{-\left(-2\right)-2\sqrt{31}}{2\cdot \:2}[/tex]

[tex]x=\frac{1+\sqrt{31}}{2},\:x=\frac{1-\sqrt{31}}{2}[/tex]

Cannot simplify farther

Answer:

The monument is standing at a distance of 834.322 feet

Step-by-step explanation:

Given

Height of the  Jefferson Davis Monument in Fairview = 351 feet

Pedro while looking at the top of the monument makes an angle with the horizontal surface =  75 degrees

As we know  tan θ = Perpendicular / Base

Substituting the given values in above equation, we get -

tan 75 = 351/Base

Base = 351/tan 75

Base = 834. 322 feet

Answer:

76

Step-by-step explanation:

okay so 13=13 d = t

13×d = t

13×6 = 76

Answer:1251231

Step-by-step explanation:

Answer:

Multiply by -2

Step-by-step explanation:

Additive inverse essentially means the counterpart that negates a number. Then, elimination can be used. In this case, the easiest change would be with the terms -4y in the first equation, and -2y in the second equation, since 2 is a factor of 4. So,

3x - 4y = -5

5x - 2y = -6

The goal here is to cancel out the -4y.

(5x - 2y)(-2) = (-6)(-2)

-10 + 4y = 12

3x - 4y = -5

Now it works.

Answer:

2 = x

Step-by-step explanation:

Both segments are congruent so we can say that:

4x + 7 = 10x - 5

Now we can simplify:

7 = 6x - 5

12 = 6x

12/6 = x

2 = x

Hope this helps!

Answer:

do it yourself kid.

Step-by-step explanation:

Answer:

A is the answer

hope this helps

have a good day ;)

Step-by-step explanation:

Yes, raising fraction as the power to the integer number is same as calculating the reciprocal of the fraction.

According to the question, the simplification method for the raising fraction as the power to the integer number(-1) is same as calculating the reciprocal of the fraction.

Raising power means multiplying that number that many times to get the answer.

What is simplification in fraction?

The word simplification in fraction is the procedure in which complicated expression can be written in a simpler form to make the calculation easy. This method is used to calculated the answers for the unknown quantity.

To learn more about the simplification in fraction from the given link:

brainly.com/question/432678

#SPJ1

Answer:

A

Step-by-step explanation:

Hello~

Here!

7 + 3.5

Ary~

Answer:

d = 162

a = 18

e = 144

g = 78

b = 18

s = 162

h = 84

e = 81

Step-by-step explanation:

Trust

Answer:

Not enough information

Answer:

[tex] \rm\displaystyle (x + 2{)}^{2} + (y + 5 {)}^{2} = {1}^{} [/tex]

[tex] \rm\displaystyle (x - 7{)}^{2} + (y + 3{)}^{2} = { 7 }[/tex]

Step-by-step explanation:

we are given the center and the redious of a circle equation

remember that,

[tex] \rm\displaystyle E _{c} :(x - h {)}^{2} + (y - k {)}^{2} = {r}^{2} [/tex]

where (h,k) is the centre coordinate and r is redious of the circle

given that, h=-2 , k=-5 and r=1

Thus substitute:

[tex] \rm\displaystyle (x - ( - 2){)}^{2} + (y - ( - 5) {)}^{2} = {1}^{2} [/tex]

simplify:

[tex] \rm\displaystyle (x + 2{)}^{2} + (y + 5 {)}^{2} = {1}^{} [/tex]

Likewise

[tex] \rm\displaystyle E _{c} :(x - h {)}^{2} + (y - k {)}^{2} = {r}^{2} [/tex]

given that,h=7,k=-3 and r=√7

substitute:

[tex] \rm\displaystyle (x - (7{))}^{2} + (y - ( - 3){)}^{2} = { \sqrt{7} ^{2} }[/tex]

simplify:

[tex] \rm\displaystyle (x - 7{)}^{2} + (y + 3{)}^{2} = { 7 }[/tex]

Answer:

The exact solution is

[tex]x = \frac{Ln(60)}{7*Ln(5)}[/tex]

And the approximation to three decimal places is:

x = 0.363

Step-by-step explanation:

Here we have the equation:

[tex]5^{7*x} = 60\\[/tex]

Now we can remember a property of the natural logarithm function:

Ln(a^n) = n*Ln(a)

Now we can apply the Ln( ) function to both sides of that equation to get:

[tex]Ln(5^{7*x}) = Ln(60)[/tex]

Then we get:

[tex]7*x*Ln(5) = Ln(60)[/tex]

Solving that for x we get:

[tex]x = \frac{Ln(60)}{7*Ln(5)} = 0.363[/tex]

So the exact solution is:

[tex]x = \frac{Ln(60)}{7*Ln(5)}[/tex]

And the approximation to three decimal places is:

x = 0.363

Answer:

1/2(n-5)

9

Step-by-step explanation:

n less 5 = n - 5

if she finds the half of the difference, divide the difference by 2 = 1/2(n-5)

If n = 23

1/2 x (23 - 5)

= 1/2  x 18 = 9

Answer:

104

Step-by-step explanation:

260x.4=104

Answer:

156

Step-by-step explanation:

Answer:

height of cone is 1.5 2 feet

hope it helps.

Answer:

Step-by-step explanation:

Answer:

To find the area, multiply the base by the height. The formula is: A = B * H where B is the base, H is the height, and * means multiply. The base and height of a parallelogram must be perpendicular.

Step-by-step explanation:

hope it helps

please mark brainliest

Answer:

distance or circumference= 2πr

2× 3.14× 3958.75

nb I got the radius by dividing the diameter by two

= 24,869.95

to hundreth = 24900