I’m a little lost on this

Answer:

b. -2

Step-by-step explanation:

Note the slope-intercept form: y = mx + b

Note that:

y = (x , y)

m = slope

x = (x , y)

b = y-intercept

First, isolate the variable, y. Note the equal sign, what you do to one side, you do to the other. Subtract 2x from both sides of the equation:

2x (-2x) + y = (-2x) + 12

y = -2x + 12

Remember, m is the variable for the term that stands for the slope (directly next to the x variable). In this case, your answer will be -2

b. -2 is your answer.

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Answer:

b. -2

Step-by-step explanation:

2x+y=12

add -2x to both sides

y = -2x + 12

this is in slope intercept form y = mx + b

m meaning the slope

in this case the slope is -2

the answer will be b. -2

We want to find the rate of change of the surface for a cube of increasing volume.

When the side length is equal to 20 inches, the surface area is increasing at a rate of 439.29 in^2 per minute.

We know that for a cube of side length S, the volume is:

V = S^3

And the surface area is:

A = 6*S^2

Here we know that the volume increases at a rate of 12in^3/min.

Because the volume depends on the side length cubed, we can say that the side length increases at a rate of:

∛(12in^3)/min = 2.29 in/min

Then, as a function of time t in minutes, we can write the side length as:

S(t) = (2.29 in/min)*t

Then the surface area equation is:

A(t) = 6*((2.29 in/min)*t)*((2.29 in/min)*t)

A(t)  = (31.46 in^2/min^2)*t^2

The rate of change is given by direct differentiation, we get:

A'(t) = 2*(31.46 in^2/min^2)*t

Now we need to evaluate this in the value of t such that the side length is equal to 20 in:

S(t) = 20in = (2.29 in/min)*t

         (20in)/(2.29 in/min) = t = 8.73 min

Then we will get:

A'(8.73min) =  2*(31.46 in^2/min^2)*8.73min = 439.29 in^2/min

This means that when the side length is equal to 20 inches, the surface area is increasing at a rate of 439.29 in^2 per minute.

If you want to learn more, you can read:

https://brainly.com/question/23483858

Length of rectangle: Area÷width

Area: Length×width

please mark BRAINLIEST.

Answer:

The answer is c I hope this helps

Answer:

Tortoise B

Step-by-step explanation:

8 inches a minute is equal to 40ft an hour.

Tortoise A: 32/per hour

Tortoise B: 40/per hour

Answer:

is part 1 and part 3 the same, no

Step-by-step explanation:

Answer:yes

Step-by-step explanation:

Answer:

7

Step-by-step explanation:

bc

9514 1404 393

Answer:

  55 -2t cars

Step-by-step explanation:

The amount raised is the difference between the revenue and expenses. If c cars and t trucks are washed for a profit of $460 after expenses of $90, the equation can be written ...

  460 = 10c +20t -90 . . . profit equation

  550 = 10c +20t . . . . . . . add 90

  550 -20t = 10c . . . . . . . subtract 20t

  c = 55 -2t . . . . . . . . . . . divide by 10

They have to wash 55-2t cars if they washed t trucks.

9514 1404 393

Answer:

Step-by-step explanation:

Let w represent the length of the wire. Then the height of attachment is (w-1). The Pythagorean theorem tells us a relevant relation is ...

  5² +(w -1)² = w²

  w² -2w +26 = w² . . . . . . . eliminate parentheses, collect terms

  26 = 2w . . . . . . . . . . . . add 2w

  13 = w . . . . . . . . . . . . divide by 2

The length of the wire is 13 feet.

__

(a) When h = 0, the equation is ...

  0 = -16t^2 +8t +8

Dividing by -8 puts this into standard form:

  2t^2 -t -1 = 0

Factoring, we get ...

  (2t +1)(t -1) = 0

The positive value of t that makes a factor zero is t = 1.

It will take 1 second for the gymnast to reach the ground.

__

(b) When h = 8, the equation is ...

  8 = -16t^2 +8t +8

Subtract 8 and divide by 8 to get ...

  0 = -2t^2 +t

  0 = t(1 -2t) . . . . factor out t

Values of t that make the factors zero are ...

  t = 0

  t = 1/2

The gymnast will be 8 feet above the ground at the start of the dismount, and 1/2 second later.

Answer:

Yes

Step-by-step explanation:

Answer:

Yes that answer is correct :)

Step-by-step explanation:

the answer is in the image above

Answer:

slope = 3

y-intercept = -4

Step-by-step explanation:

In order to find the slope and the y-intercept, transform the given equation into its slope-intercept form, y = mx + b:

Add 9x to both sides:

-9x + 9x + 3y = 9x - 12

3y = 9x - 12

Divide both sides by 3:

[tex]\frac{3y}{3} = \frac{9x - 12}{3}[/tex]

y = 3x - 4    This is the slope-intercept form where the slope, m = 3, and the y-intercept, b = -4.

To graph the line, start at the y-intercept (0, -4). Then, use your slope, m = 3 (rise 3 units, run 1 unit).  Attached is a screenshot of the graphed line, using the rise/run technique. I also plotted extra points.

Answer:

4.796

Step-by-step explanation:

get the 9% which is .178 plus that by 2.2 and x 2

Answer:

144

Step-by-step explanation:

54+90=144

144-90=54

90+54=144

144-54=90

Building and solving an equation, it is found that each bottle of juice costs $1.05.

Her total cost of $26.91 is composed by:

Hence, the equation is:

[tex]1.71 + 24j = 26.91[/tex]

Solving it, we find the cost of a bottle of juice, hence:

[tex]1.71 + 24j = 26.91[/tex]

[tex]24j = 25.2[/tex]

[tex]j = \frac{25.2}{24}[/tex]

[tex]j = 1.05[/tex]

Each bottle of juice costs $1.05.

A similar problem is given at https://brainly.com/question/24812278

Answer:

(a) -7+3

(b)-7+(-3)

Answer: Therefore, your equation of the function will be y = 4x – 4.

Step-by-step explanation:

Answer:

fh

Step-by-step explanation:

Answer:

21.6 magazines

Step-by-step explanation:

260/12=21.6

Answer:

3/8 can be 3:8 or 3n:8n or 3n/8n where n is not zero

Step-by-step explanation:

Answer:

Step-by-step explanation:

12 = 24% . x

12 = 24/100 . x

12 = 0.24x

12/0.24 = x

50 = x

Answer:

50 is the answer.

Step-by-step explanation:

12÷.24=50

to double check ur work do 50x.24 and it comes out to 12

Answer:

5x - 5y

Step-by-step explanation:

Answer:

5x-5y or x=y.

Step-by-step explanation:

If 5(x-y) then we can distribute that, right?

then that turns into 5x-5y, lets say that equals zero, since there is no other information. Then 5x-5y=0 and wecould add 5y to both sides, getting 5x=5y

dividing 5x=5y/5 we get x=y.

Answer:

1. 6

2. -1

3. 5

4. 2

5. -1

6. 5

7. 6

Answer:

Hey mate.....

Step-by-step explanation:

This is ur answer....

Hope it helps!

Brainliest pls!

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Answer:

subset of {A, B, C} = { }, {A}, {B}, {C}, {A,B}, {B,C},{C,A}

Hope that my answer is helpful to you

Answer:

The sequence of transformation is 90 degrees counterclockwise rotation, followed by a horizontal translation to the right by 2 units.

The order pair rule for each are (x, y) to (-y, x) and (x+2,y)

The length of TU in the right triangle is  156.15 m.

The area of the rectangle is 12335.85 m²

The length of GH in the right triangle is 182.33 m

The area of the triangle is 8934.17 m²

Right angle triangle are triangle that has one of its angle as 90 degrees. The sides of the triangle can be found using Pythagoras theorem. Therefore, using Pythagoras theorem,

TU² = 175² - 79²

TU² = 30625 - 6241

TU² = 24384

TU = √24384

TU = 156.153770368

TU = 156.15 m

area of rectangle = lw

area of rectangle =  156.15 × 79

area of rectangle =  12335.85 m²

GH² = 207² - 98²

GH² = 42849 - 9604

GH² = 33245

GH = √33245

GH = 182.33211456

GH = 182.33 m

Area of the triangle = 1 /  2 bh

Area of the triangle = 1 /  2 × 98 × 182.33

Area of the triangle = 17868.34 / 2

Area of the triangle = 8934.17 m²

learn more on right triangle here: https://brainly.com/question/22897958

Answer:

2z+2+4z=16/5+2z-6/5; 5r+2=6r+3-r

One Solution: 3/2x+2.3-1/2x=4.3+x; 2x+2/3=2x+4/5-4x; 32p-2.5+2.1p=5p-7/2

Infinite Solution: 17/4+4.2y-9/4=2.2y+6+2y-4

Step-by-step explanation:

Answer:

2a) because they are continuous lines that don't intercept

Step-by-step explanation:

Answer:

2a) They all have the slope of 2x.

2b) R) y = 2x-3

2c) R is the lowest line because the b value (-3) has the least value out of the 3 choices.