What is 5(2+x+3) Simplified ?

Answer:

b. y = - 2x² – 3x + 5

Step-by-step explanation:

If you check on a graphing calculator or desmos, you will see that the parabola opens down, so there is a highest point, or a maximum. You can also know that without a calculator by looking at the sign in front of x. Since answer choice b is the only one with a negative in front (meaning that the parabola opens down giving you a maximum) then you will know that that's the correct answer.

Answer:

(-infinity, 0]

Step-by-step explanation:

I'm assuming you meant  f(x) = -4x^2.  If so, the graph is that of a parabola that opens down and has vertex at (0, 0).  In other words, f(x) is always zero or below zero.

Thus the range is (-infinity, 0]

Answer:

x=12

Step-by-step explanation:

Answer:

The answer is C.

Step-by-step explanation: The number between 0 and 1. Think of decimals as cents, 100 cents makes a whole. So the number will be greater than 0 but less than 100.

Answer:

Right answer is D.

Step-by-step explanation:

I just tried a couple of fractions like 3/4 =.75=75%   1/2=.5=0.5%

Then I got it right on test :)

The question is incomplete. Here is the complete question.

The initial mass of a certain species of fish is 7 millions tons. The mass of fish, if left alone, would increase at a rate proportional to the mass, with a proportionality constant of 2/yr. However, comercial fishing removes fish mass at a rate of 15 million tons per year.

(a) When will all fish be gone?

(b) If the fishing rate is changed so that the mass of fish remains constant, what should the rate be?

Answer: (a) t = 1.35 years.

              (b) Rate = 14,000,000

Step-by-step explanation:

(a) Initial mass is [tex]m_{0}[/tex] = 7,000,000

Rate of increase and comercial fishing gives an equation of growth:

[tex]\frac{dm}{dt}=2m-15,000,000[/tex]

m' - 2m = - 15,000,000

This is an ordinary linear equation (ODE) of first order, of type:

y' + a(x)y = f(x)

where a(x) and f(x) are continuous.

To solve this type of linear equation, first calculate integrating factor, using:

[tex]u(x) = e^{\int\limits {a(x)} \, dx }[/tex]

In our case,

[tex]u(t) = e^{\int\limits {-2} \, dt }[/tex]

Solving:

[tex]u(t) = e^{-2t }[/tex]

The general solution of a ODE can be written as

[tex]y=\frac{1}{e^{u(x)}}[\int\ {u(x).f(x)} \, dx + c][/tex]

In our case:

[tex]m=\frac{1}{e^{-2t}}[\int\ {-2t.(-15)} \, dt + c][/tex]

Solving:

[tex]m=\frac{1}{e^{-2t}}[\frac{15}{2}e^{-2t}+c ][/tex]

To find constant c, use initial condition, i.e., m(0)=7,000,000:

[tex]7,000,000=\frac{1}{e^{-2.0}}[\frac{15}{2}e^{-2.0}+c ][/tex]

[tex]c=-500,000[/tex]

Then for the fish growth, general equation is:

[tex]m=7500,000-500,000e^{2t}[/tex]

When the fish is gone, means m = 0, then:

[tex]7500,000-500,000e^{2t}=0[/tex]

[tex]500,000e^{2t}=7500,000[/tex]

[tex]e^{2t}=15[/tex]

[tex]ln(e^{2t})=ln(15)[/tex]

[tex]t=\frac{ln(15)}{2}[/tex]

t = 1.35

It will take 1.35 years for the fish to be gone.

(b) For the mass to be constant, rate of growth must be zero:

[tex]\frac{dm}{dt}=0[/tex]

Suppose the changed fishing rate is k:

[tex]2m_{0}-k=0[/tex]

[tex]-k=-2.7,000,000[/tex]

k = 14,000,000

To remain constant, rate must be 14,000,000.

Answer:I think it’s 40 sorry if it’s wrong :/

Step-by-step explanation:

Answer: Its 58382027.038

Step-by-step explanation:

Answer:

The answer is, 21%

Step-by-step explanation:

by adding all the responses, you get a total of 200. Then, you do 42/200 and then simplify, and 21/100 is 21%

Answer: left 9 and up 6

Step-by-step explanation:

just if it’s in the bars it’s left if + and on the outside its up if +

Answer:

3s + 22 = 13

Step-by-step explanation:

Answer:

4000

Step-by-step explanation:

140$ = 3.5 , divide by 3.5 on both sides

1% = 40$

100% = 4000$

Answer:

[tex]\huge\boxed{\$4,000}[/tex]

Step-by-step explanation:

[tex]p\%=\dfrac{p}{100}\\\\3.5\%=\dfrac{3.5}{100}=0.035\\\\3.5\%\ \text{of}\ x\ \text{is}\ \$140\\\\0.035\cdot x=140\qquad\text{divide both sides by 0.035}\\\\\dfrac{0.035\cdot x}{0.035}=\dfrac{140}{0.035}\\\\x=4,000[/tex]

Answer:

21x² - 19x + 4

Step-by-step explanation:

Step 1: Write factors

(7x - 4)(3x - 1)

Step 2: FOIL (First Outside Inside Last)

21x² - 7x - 12x + 4

Step 3: Combine like terms

21x² - 19x + 4

Answer:

Hay un máximo de tres ceros en el producto de un número distinto de cero cero menor que 10 y 500

Para poder ver esto, la forma más fácil para resolver este problema es multiplicar todos los números entre 1 y 9 por 500, es decir:

01*500 = 500

2*500 = 1.000

3*500 = 1.500

4*500 = 2.000

5*500 = 2.500

6*500 = 3.000

7*500 = 3.500

8*500 = 4.000

9*500 = 4.500

Como vemos, si multiplicamos a 500 por cualquier número par, entonces obtenemos un número con tres ceros, mientras que si este es impar solamente obtenemos dos ceros

dame coronaa

Answer:

Axis of symmetry: x = 2

Vertex at: (2, -13)

y-intercept is (0, -5)

Step-by-step explanation:

The equation for the x-value of the vertex in a quadratic of the form:

[tex]y=ax^2+bx+c[/tex]

is given by:

[tex]x_{vert}=-\frac{b}{2\,a}[/tex]

which in our case gives:

[tex]x_{vert}=\frac{8}{2*2} =2[/tex]

Then the equation for the axis of symmetry is given by:  x = 2

and the y of the vertex can be calculated as:

[tex]y_{vert}=2 (2)^2-8\,(2)-5=-13[/tex]

Then the vertex is at the point: (2, -13)

And the y-intercept is found when x=0, that is:

y-intercept is (0, -5)

Answer:

16 < 10

Step-by-step explanation:

Less than = <

[tex]16 < 10[/tex]

By the way, this inequality is FASLE

Answer:

[tex] x > - 7.5[/tex]

Step-by-step explanation:

[tex]x - 5.3 > - 12.8 \\ x > - 12.8 +5.3 \\ x > - 7.5[/tex]

Answer:

reflect it about the x axis and  stretch it  by 2 in the y direction

Step-by-step explanation:

f(x) = |x|  to f (x)=-2|x|

y = −f(x)  Reflects it about x-axis

y = Cf(x)  C > 1 stretches it in the y-direction

so we reflect it about the x axis and  stretch it  by 2 in the y direction

Answer: reflect it about the x axis and stretch it by 2 in the y direction

Step-by-step explanation:

Answer:

14.62

Step-by-step explanation:

Answer:

14.62

Step-by-step explanation:

23.40

-   8.78

________

 1 4  .6 2

For you to answer you need to place the commas correctly. The commas must be below each other to help you place the other numebrs correctly vertically. And after that you subtract and remember borrowing :)

HOPE IT HELPED

7850 ft²

Hi there !

d = 2r => r = d/2 = 100ft/2 = 50 feet

A = πr²

= 3.14×(50ft)²

= 3.14×2500ft²

= 7850 ft²

Good luck !

Answer:

x = 12

Step-by-step explanation:

For this problem it is important to note that the sum of the two unknown angles' measurements is equivalent to the given known angle measurement as implied by the drawing.  With this in mind let's write our givens:

m<CGF = 10x - 10

m<HGC = 3x + 10

m<HGF = 156

So now let's form our equation to represent the drawing:

m<CGF + m<HGC = m<HGF

And now let's solve the equation to find the value of the x.

m<CGF + m<HGC = m<HGF

( 10x - 10 ) + ( 3x + 10 ) = 156

10x - 10 + 3x + 10 = 156

13x = 156

x = 12

Hence, our value for x is 12.

Cheers.

Answer:

It takes takes them 31.67 secs to meet after Person A starts walking

OR

34.67 secs after Person B starts walking

Step-by-step explanation:

First, we will find the perimeter of the rectangle

From,

Perimeter of rectangle = 2 ([tex]l[/tex] + [tex]b[/tex])

Where [tex]l[/tex] is the length

and [tex]b[/tex] is the breadth

From the question, [tex]l[/tex] = 100m

and [tex]b[/tex] = 50m

Hence,

Perimeter of the rectangle = 2 (100+50)

= 2(150) = 300m

Hence, the perimeter of the rectangle is 300m

This is the total distance that will be covered by both persons by the time they meet.

Let the distance covered by person A be [tex]S_{1}[/tex]

and the distance covered by person B be [tex]S_{2}[/tex]

We can write that

[tex]S_{1}[/tex] + [tex]S_{2}[/tex] = 300m

Velocity of person A, [tex]V_{A}[/tex] = 4 m/s

and velocity of person B, [tex]V_{B}[/tex] = 5 m/s

From the question, Person A starts walking 3 seconds after person B,

This means, if person A spends [tex]t[/tex] secs before they meet, then person B would spend (3 + [tex]t[/tex]) secs.

For Person A,

Velocity = 4 m/s

Time = [tex]t[/tex] secs

Distance = [tex]S_{1}[/tex]

From,

[tex]Velocity = \frac{Distance}{Time}[/tex]

Then,

[tex]Distance = Velocity \times time[/tex]

[tex]S_{1} = 4 \times t[/tex]

[tex]S_{1} = 4t[/tex] ...... (1)

For Person B

Velocity = 5 m/s

Time = (t + 3) secs

Distance = [tex]S_{2}[/tex]

Also, from

[tex]Distance = Velocity \times time[/tex]

[tex]S_{2} = 5 \times (3+t)[/tex]

[tex]S_{2} = 5(3+t)[/tex] ...... (2)

Recall that, [tex]S_{1}[/tex] + [tex]S_{2}[/tex] = 300m

Then, [tex]S_{2}[/tex] = 300m - [tex]S_{1}[/tex]

We can then write that,

300m - [tex]S_{1}[/tex] [tex]= 5(3+t)[/tex]

Then,

[tex]S_{1} = 300 - 5(3+t)[/tex] ..... (3)

Equating equations (1) and (3), we get

[tex]300 - 5(3+t) = 4t[/tex]

[tex]300 - 15 -5t = 4t\\9t = 285\\t = \frac{285}{9}\\[/tex]

[tex]t = 31.67 secs[/tex]

This is the time spent by Person A

Hence, it takes takes them 31.67 secs to meet after Person A starts walking OR

34.67 secs after Person B starts walking

Answer:

I mistakenly rated Abdulazeez10's answer 2 stars because I thought he mixed up his variables, but I was actually the one who mixed up my variables.

Step-by-step explanation:

Sorry, Abdulazeez10 :( I can't change my rating, but just so everyone else knows, his answer is 100% correct!

Answer:

-3 -3 -1 1

Step-by-step explanation:

give me five stars and ill tell you

Answer: Answer: -3,-1, and 1.

Step-by-step explanation: You are given the relation R = {(-3, -2), (-3, 0), (-1, 2), (1, 2)} The domain of the relation are all possible inputs and the range of the relation are all possible outputs. So, the inputs are : -3,-1,1; and the outputs are : -2,0,2. As a result, the domain is : -3,-1,1; and the range is : -2,0,2.

Answer:

∠BOC = 45

Step-by-step explanation:

∠BOC + ∠AOB = ∠AOC ----------eq.1

where:

∠AOC = 96

∠BOC = 8x - 67

∠AOB = 9x - 75

find:  ∠BOC

plugin values into the eq.1

∠BOC + ∠AOB = ∠AOC

8x - 67 + 9x - 75 = 96

8x + 9x - 67 - 75 = 96

17x = 96 + 67 + 75

17x = 238

x = 238 / 17

x = 14

plugin x into ∠BOC = 8x - 67

∠BOC = 8x - 67

∠BOC = 8(14) - 67

∠BOC = 45

Answer:

[tex]C= 40t+100[/tex]

Step-by-step explanation:

 In this exercise, we want to model an equation to represent the cost that Gabriel will when registering with a gym.

from the given information, we can model the cost after the equation of a straight line

y= mx+c

so "C" is the cost, while $40 is a fee dependent on "t" the number of months subscribed

and $100 is the joining fee, which is a constant term

[tex]C= 40t+100[/tex]

Answer:

[tex]y-4=9[/tex]

The opposite of subtraction is addition, so you would have to add 4 to both sides:

[tex]y-4+4=9+4[/tex]

[tex]y=13[/tex]

The value of the y for the equation,y – 4 = 9  will be y=13 and e have to apply the subtraction operation must be applied to both sides in order to isolate the variable y.

The subject of arithmetic operations includes the study of numbers and their operations, which are important to all other branches of mathematics. These systems' fundamental operations are addition, subtraction, multiplication, and division.

It is given that the equation is,y – 4 = 9.

We have to solve the equation y – 4 = 9 and find the operation that must be applied to both sides in order to isolate the variable y.

The following steps are to be taken to isolate the variable y.

y – 4 = 9

y-4+4=9+4

y=13

Thus, the value of the y in the equation, y - 4 = 9, will be 13, and in order to isolate the variable y, the subtraction operation must be done on both sides.

Learn more about the arithmetic operations here,

https://brainly.com/question/25834626

#SPJ2

Answer

the plane will travel 170 miles per hour because you double the amount it already went because you had to double the minutes. so the answer is 170

Step-by-step explanation:

The plane traveled 85 miles in 30 minutes.

1 hour is 60 minutes.

30 minutes x 2 = 60 minutes ( 1 hour)

85 miles x 2 = 170 miles in one hour

The speed is 170 miles per hour

Answer:

-9 - 6n is the answer

Steps to solve:

-3(3 + 2n)

~Distribute

-9 - 6n

Best of Luck!

Answer:

$26.48

Step-by-step explanation:

First you find out what 6 percent OF 24.99 dollars is,

OF stands for multiplication

so multiply 6 percent of 24.99

= 0.06 x 24.99

=  $1.4994 (That's a point not a comma, so it's around 1 dollar)

Then once you have found the sales tax which we found up there, you add it to the total cost of the shirts. (If it was a discount you would subtract it because it's a discounted price which means it's less - just another tip :) )

Anyway so you add it to the price,

24.99 + 1.49

= $26.48

Hope this helps! :)

Answer:

the missing measure is 129° all around is 360° half of 360° is 180°, 180° is one line so if you subtract 51° from 180° you get 129° im not so good at explaining but i hope you understand

Answer:

Option (1)

Step-by-step explanation:

This question is incomplete; Find the complete question in the attachment.

Quadrilateral JKLM is rotated 90° clockwise to produce quadrilateral J'K'L'M'.

By this transformation complete quadrilateral JKLM rotates from quadrant 1 to quadrant 4 and both will be similar.

But there will be no change in the given angles.

Therefore, m∠M = m∠M' = 60°

Option (1) will be the correct option.