does anyone know this??

complete the solution of the equation. Find the value of y when x equals
-30 -2x - 3y = 42

Answer: y = -3x -3

Step-by-step explanation:

y = mx + b

3x + y = -3

y = -3x -3

Answer:

slope intercept form: y=mx+c

*m = gradient

*c = y-intercept

3x + y = -3

y = -3x - 3

Answer:

- sign between 9 and 64 under root, it should be + sign

Step-by-step explanation:

(-4)*(-8)(2)= 64

It should read x= √9+64 but not √9-54 which lead to incorrect solution

Answer:

q= 10

Step-by-step explanation:

9q - 10q = -10

-q = -10

q= -10/-1 = 10

Answer:

q=10

Step-by-step explanation:

subtract 10q from both sides than divide-10 by -1

Answer:

60

Step-by-step explanation:

We can use the pythagorean theorem to find the leg.

10^2+x=13^2

x=12

We now find the area given the height of the triangle.

10 X 12=120

120/2=60

Answer:

D

Step-by-step explanation:

Answer:

a = - 3, b = 5

Step-by-step explanation:

To rationalise the denominator multiply the numerator/ denominator by [tex]\sqrt{2}[/tex]

= [tex]\frac{\sqrt{2}(10-\sqrt{18}) }{(\sqrt{2})^2 }[/tex]

= [tex]\frac{10\sqrt{2}-\sqrt{36} }{2}[/tex]

= [tex]\frac{10\sqrt{2}-6 }{2}[/tex]

= 5[tex]\sqrt{2}[/tex] - 3

= - 3 + 5[tex]\sqrt{2}[/tex] ← in the form a + b[tex]\sqrt{2}[/tex]

with a = - 3 and b = 5

Answer:

1 + root 5, 1 - root 5

Step-by-step explanation:

I assume you mean 3x^2-6x-12=0.

First, note that you can divide both sides by 3. You get:

x^2-2x-4=0

Use the quadratic equation.

[tex]x=\frac{2\pm\sqrt{4+16}}{2}=\frac{2\pm2\sqrt{5}}{2}=1\pm\sqrt{5}[/tex]

Therefore, x=1 + root 5, 1 - root 5

Answer:

4

Step-by-step explanation:

There are 4 digits in the number 9005

Answer:There are four significant digits because non zero digits are always significant and zero between two significant figures are also significant

Step-by-step explanation:

I hope this will help you

Answer:

6.382219183

Step-by-step explanation:

If you put it in a calculator it tells you :/

Answer:

6.382219183

Step-by-step explanation:

Answer:

y = -1/4 (x + 2)² + 4

Step-by-step explanation:

y = -1/4x² - x + 3

y = - 1/4 ( x² + 4x - 12)

y = -1/4 (x² + 4x + 4) + 3 + 1

Y = -1/4 (x + 2)² + 4

Answer:

The answer is the bottom left because those lines are the only ones which are not parallel.

Answer: Top Right

Step-by-step explanation:

Because all of the lines are are parallel lines that face the right.

Answer:

(–5, 12) is the correct answer.

Step-by-step explanation:

We are given the following values:

[tex]cosec\theta = \dfrac{13}{12}\\sec\theta=-\dfrac{13}{5}\\cot\theta =-\dfrac{5}{12}[/tex]

Now, we know the following identities:

[tex]sin \theta = \dfrac{1}{cosec\theta}\\cos \theta = \dfrac{1}{sec\theta}\\tan \theta = \dfrac{1}{cot\theta}[/tex]

Now, the values are:

[tex]sin\theta = \dfrac{12}{13}\\cos\theta=-\dfrac{5}{13}\\tan\theta =-\dfrac{12}{5}[/tex]

Sine value is positive and cos, tan values are negative.

It can be clearly observed that [tex]\theta[/tex] is in 2nd quadrant.

2nd quadrant means, the value of [tex]x[/tex] will be negative and [tex]y[/tex] will be positive.

Let us have a look at the value of [tex]tan\theta[/tex]:

[tex]tan\theta = \dfrac{Perpendicular}{Base}\\OR\\tan\theta = \dfrac{y-coordinate}{x-coordinate} = -\dfrac{12}{5}\\\therefore y = 12,\\x = -5[/tex]

Please refer to the attached image for clear understanding and detailed explanation.

Hence, the correct answer is coordinate (x,y) is (–5, 12)

Answer:

A (–5, 12) on E2020

Step-by-step explanation:

Answer:

D.

[tex] {4}^{x + 7} [/tex]

Step-by-step explanation:

since it is an exponential graph shifted 7units to the left would be

[tex] {4}^{x + 7} [/tex]

Answer:

8 and 10

Step-by-step explanation:

10-8=2

10*8=80

Answer:

list factors of 80

1,80

2,40

4,20

5,16

8,10

Which factors have a difference of 2?

80-1=79

40-2=38

20-4=16

16-5=11

10-8=2

10 and 8 have a difference of 2 so 10 and 8 is the answer. Hope this helps

Step-by-step explanation:

Answer:

<A

Step-by-step explanation:

The vertex must in the middle to name the angle

EAU or UAE

Since there is only one angle attached to the vertex, we can name it with just the vertex

A

Answer:

∠A

Step-by-step explanation:

The angle shown could be ∠A or ∠EAU or ∠UAE.

The only option that show one of these is ∠A.

We call this angle ∠A the letter A is closest to the angle.

Answer:

Step-by-step explanation:

2y^4 x 5y^3 = 10y^7

3gh^2 x 4g^3h^3 = 12g^4h^5

Answer:

[tex]10y^7[/tex]

[tex]12g^4h^5[/tex]

Step-by-step explanation:

When you multiply exponents together, it is a rule that you add them together. So,

[tex]2y^4(5y^3) = 10y^{(4 + 3)} = 10y^7[/tex]

[tex]3gh^2(4g^3h^3) = 12g^{(3 + 1)}h^{(2+3)} = 12g^4h^5[/tex]

Answer:

Discriminant = 140

Step-by-step explanation:

a = -2, b = 6, c = 13

6² - 4(-2)(13)

36 + 8(13)

36 + 104

140

Answer:

Discriminant = 140

Step-by-step explanation:

The rate of change for Neil's business is:

The initial value of Neil's business is:

We can come to this conclusion because:

With this in mind, we can perform the calculations by incrementing the value of the business by $50 every year, until 2008, from 2005.

The equation in slope-intercept form that represent the fees that Neil charges each year is:

Read more about slope intercept here:

https://brainly.com/question/1884491

Answer:

The area of a circle with a circumference that equals the perimeter of the square is 9.62 units²

Step-by-step explanation:

The first thing we must do is find the perimeter of the square. In the problem, we are given that one of the side measurements of the square is 2.75 units. In order to find the perimeter of this square, we must multiply 2.75 by 4 because a square has four equal side measurements.

2.75 × 4 = 11

So, the perimeter of the square is 11 units. This number will also be the number for the circumference of the circle as mentioned in the problem. So, the circumference of the circle is 11 units. Now, we must find the radius of the circle so we can find the area. Let's use the formula for finding radius given the circumference.

[tex]Radius = \frac{circumference}{2\pi}[/tex]

Now, let;s plug in 11 for the circumference because our circumference is 11 units.

[tex]Radius=\frac{11}{2\pi}[/tex]

Multiply 2 by pi. We will use 3.14 in replacement of pi.

[tex]Radius=\frac{11}{6.28}[/tex]

Now, divide.

[tex]Radius=1.75[/tex]

So, our radius is 1.75 units. We can know use this number to find the area of the circle.

[tex]Area=r^2\pi[/tex]

Plug in 1.75 for the radius.

[tex]Area=(1.75)^2\pi[/tex]

Simplify the exponent.

[tex]Area=(3.0625)\pi[/tex]

Multiply the numbers.

[tex]Area=9.61625[/tex]

Lastly, we round this number to the nearest hundredth as it is asked of us in the problem.

9.61625 = 9.62

So, the area of the circle is 9.62 units²

Answer:

9.62

Step-by-step explanation:

Got it on the test

Answer:

It will take Jake 0 hours and It will take Brianna 15 hours

Step-by-step explanation:

Let x be the no. of hours taken by Brianna to complete work alone

We are given that Jake does a job in 15 hours less time than Brianna

So,Jake work alone in hours =x-15

We are given that  they can do the job together in 10 hours

So, [tex]\frac{1}{x-15}+\frac{1}{x}=\frac{1}{10}\\\frac{x+x-15}{(x-15)x}=\frac{1}{10}\\x=3,15[/tex]

So, Brianna complete work in 15 hours

So, Jake work alone in hours =x-15=15-15=0

So, It will take Jake 0 hours and It will take Brianna 15 hours

Answer:

Solution,

[tex]diameter = 5 \: cm \\ height = 30 \: cm \\ surface \: area \: of \: cylinder \\ = 2\pi \: r(h + r) \\ = 2 \times \frac{22}{7} \times 2.5(30 + 2.5) \\ = 5 \times \frac{22}{7} \times 32.5 \\ = 510.71 \: {cm}^{2} [/tex]

hope this helps...

Good luck on your assignment...

Answer :

Here,

Diameter = 5cm so, radius = 5/2 = 2.5

Height = 30 cm

Surface area of a cyclinder = 2πr(r+h)

= 2 × 22/7 × 2.5 ( 30 + 2.5 )

= 5  ×  22/7  ×  32.5

= 510.71 cm²

Answer:

see explanation

Step-by-step explanation:

To solve these equations equate them to zero, that is

x² - x - 42 = 0

Consider the factors of the constant term (- 42) which sum to give the coefficient of the x- term (- 1)

The factors are - 7 and + 6, since

- 7 × 6 = - 42 and - 7 + 6 = - 1 , thus

(x - 7)(x + 6) = 0

Equate each factor to zero and solve for x

x - 7 = 0 ⇒ x = 7

x + 6 = 0 ⇒ x = - 6

Solutions are x = - 6, x = 7

---------------------------------------------------------

x² + x - 6 = 0 ← in standard form

(x + 3)(x - 2) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

x - 2 = 0 ⇒ x = 2

Solutions are x = - 3, x = 2

------------------------------------------------------------

x² - 25 = 0 ( add 25 to both sides )

x² = 25 ( take the square root of both sides )

x = ± [tex]\sqrt{25}[/tex] = ± 5

Solutions are x = - 5, x = 5

Answer:

sin(g) = x/z

Step-by-step explanation:

Sine is opposite over hypotenuse. Our opposite is x and our hypotenuse is z. Therefore, our answer is sin(g) = x/z

Answer:

Ok, the speed is 18 mph.

The angle is 293°, and we usually measure the angles from the x-axis, so we can write our coordinates of velocity as:

Vx = 18mph*cos(293°) = 7mph.

Vy = 18mph*sin(293°) = -16.6mph.

Then we can write this as a vector (Vx, Vy)

Velocity = (7mph, -16.6mph)

Now, for the position, we can integrate over time, and using that the position (0,  0) is the starting point of the ship, we have that the position vector is:

P(t) = (7mph*t, -16,6mph*t)

Where t is the number of hours after the ship leaved the port.

If t = 0 is 0:00pm, then at 3:30pm we have t = 3 hours and 30 minutes

one hour has 60 minutes, then 30 minutes is equivalent to 0.5 hours.

Then 3:30pm we have t = 3.5 houes.

Now we replace this in the position vector and the location of the ship at 3:30pm is:

P(3.5h) = (7mph*3.5h, -16.6mph*3.5h) = (24.5 mi, -58.1 mi)

Where the first component describes the displacement in the x-axis, and the second component describes the displacement in the y-axis.

Answer: 1) -58  2) 24.6  3) 24.6  4) north  5) 58  6) west

Step-by-step explanation: I took the test.

Answer:

Graph (B)

Step-by-step explanation:

Given inequality is,

x + 2y ≤ 47

This inequality has a sign of less than equal to ( ≤ ).

Properties of this inequality when graphed will be,

1). Sign of equal to in the given inequality shows that the graph of the line will be a solid line.

2). Sign of less than represents the shaded region below the line.

Therefore, Graph (B) will be the answer.

Answer:

The answer is A

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

67

Step-by-step explanation:

67 bcz

Answer:

67

Step-by-step explanation:

Answer:

see below

Step-by-step explanation:

The domain is  the possible x values

For the top graph x goes from 0 to 240

0 ≤x≤240

For the bottom graph the domain is from -3 but not including -3 because of the open circle to 6

-3 < x ≤6

(-3,6]

The range is the possible y values

The lowest value of y is -5 and the largest is 7

-5 ≤y≤7

[-5,7]

Answer:

2/3 hours or 40 mins.

Step-by-step explanation:

No. of trees planted by David = 11

No. of hours worked by David to plant 11 trees = 7 1/3 hours = (7*3 + 1) /3 = 22/3

It takes him about the same amount of time to plant each tree

let time taken to plan 1 tree be x

then  time taken to plan 1*11 tree = 11*x

But, given that total time taken is 22/3 hours

thus,

11x = 22/3 hours

x = 22/(3 *11) = 2/3

Thus, it took 2/3 hours to plant each tree.

As 1 hour has 60 minutes

Time taken in minutes to plant 1 tree = 2/3 *60 mins = 40 mins

It takes David 2/3 hours to plant each tree.

Since it takes David 7 1/3 hours today to plant 11 trees.

Therefore time taken to plant 11 trees = 7 1/3 hours = 22/3 hours

The time taken to plant each tree = 22/3 hours ÷ 11 trees = 2/3 hours per tree

Therefore it takes David 2/3 hours to plant each tree.

Find out more at: https://brainly.com/question/16869288

Answer: The  real answer is 62 steps per min

Hope this helps!

Robert averaged 62 steps in a minute.

An equation is a mathematical statement formed when two expressions are equated using an equal sign.

The equations are useful in the determination of unknown parameters.

The equations are of various types, such as Trigonometric equations, and quadratic equations.

The number of steps climbed by Robert is 775

The time taken by Robert to climb the steps is 12 1/2 minutes

The time taken by him = 25/2 minutes in fraction form

The time taken by him = 12.5 minutes in decimal form.

The steps he walks in 1 minute have to be determined.

Let x be the number of steps he walks in 1 minute, then the equation formed is,

x  = Total steps  /  Total Time

x = 775/12.5

x = 7750/125

x = 62 minutes.

So, the average number of steps Robert walked is 62 minutes.

To know more about Equation

https://brainly.com/question/10413253

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