I really need help please

Answer:

The slope of a line is

[tex] \frac{y2 - y1}{x2 - x1} [/tex]

Get 2 points off each line

(x1, y1)

(x2, y2)

And sub them into the formula.

The y intercept is where the line cuts the y axis (the vertical line)

From what I can make out the y intercept for the first part in question 12 is (0,-2) and for the third part is (0,0) but I can't see the second one.

It might help if you took a clearer photograph I'm so sorry but I can't really see it.

Answer:

it should be 45,870

Step-by-step explanation:

Answer:

if you were to get a answer you would have to put it in ur own words because some teachers come on here

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Remember that the area of a rectangle is given by the formula [tex]A=lw[/tex].

We know that the length is [tex](x+5)[/tex] and the width is [tex](x-2)[/tex]. Therefore, the area will be:

[tex]A=(x+5)(x-2)[/tex]

Expand. Use the Distribute Property. This yields:

[tex]A=(x+5)(x)+(x+5)(-2)[/tex]

Multiply:

[tex]A=(x^2+5x)+(-2x-10)[/tex]

Combine Like Terms:

[tex]A=x^2+(5x-2x)-10\\A=x^2+3x-10[/tex]

Therefore, our answer is B.

Answer:

y=[tex]\frac{2}{7}[/tex]x

Step-by-step explanation:

First: find slope of line by using the formula [tex]\frac{y_2-y_1}{x_2-x_1}[/tex] with the two points (0,0) and (7,2)

slope(m) = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex] = [tex]\frac{2-0}{7-0}[/tex] = [tex]\frac{2}{7}[/tex]

Second: plug your data into the point slope formula [tex]y-y_1=m(x-x_1)[/tex]

y-0=[tex]\frac{2}{7}[/tex](x-0)

y-0=[tex]\frac{2}{7}[/tex]x

y=[tex]\frac{2}{7}[/tex]x

Answer:

y=2/7x

Step-by-step explanation:

Answer:

A. The triangles are similar because the ratios of the corresponding sides are the same

Step-by-step explanation:

Both ∆sloom similar in shape. Let's find out if they are actually similar.

∆TUV and ∆QRS are similar if the ratio of their corresponding sides are the same all through.

Thus:

TU = 70, QR = 25, UV = 84, RS = 30, TV = 42, QS = 15

If both ∆s are similar, then, TU/QR = UV/RS = TV/QS

TU/QR = 70/25 = 2.8

UV/RS = 84/30 = 2.8

TV/RS = 42/15 = 2.8.

Ratio of corresponding sides is the same, therefore, both triangles are similar.

Therefore, the following statement is true:

A. The triangles are similar because the ratios of the corresponding sides are the same

Answer:

c.)2 g/ml

Step-by-step explanation:

Given:

Mass of block = 12 g

Volume of block = 6 ml

Required:

Density of the block

SOLUTION:

Density is given as the mass of the block per unit volume.

Thus, density = mass/volume

Density of block = [tex] \frac{12 g}{6 ml} [/tex]

= 2 g/ml.

The answer is c. 2 g/ml.

Answer:

3 hours

Step-by-step explanation:

$12 = 2hours

Find how much Clare was paid for one hour

Total money earned ÷ number of hours = wage per hour

12 ÷ 2 = $6 per hour

set up equation

6x = 18

This equation says 6 dollars an hour × number of hours = $18

To solve for this equation, divide both sides by 6 (this isolates the variable)

6x ÷ 6 = 18 ÷ 6

1x = 3

x = 3

Answer:

8

Step-by-step explanation:

List the prime factors of each number. Multiply those factors both numbers have in common.

Answer: Point B represents the number 2 on the number line.

How?: Well, any whole number (without the minus/negative sign), is equal to a positive number. 2 is a whole number. So, therefore, it's Point B.

Answer:

4

Step-by-step explanation:

Answer:

Ratio time to the number of burritos = 4:9

Step-by-step explanation:

Given:

Number of burritos make = 18

Total time taken = 8 min

Find:

Ratio time to the number of burritos

Computation:

Ratio time to the number of burritos = Total time taken / Number of burritos make

Ratio time to the number of burritos = 8 / 18

Ratio time to the number of burritos = 4 / 9

Ratio time to the number of burritos = 4:9

Answer:

5+6=11

Step-by-step explanation:

:D

Answer:

t=5c+6d

Step-by-step explanation:

5c=cheese pizza cost

6d=topped pizza cost

Answer:

317 x 18 = 5706

Answer:

А(0/6;-2) и B(-5.6;17)

Step-by-step explanation:

(-2;4) поставь координаты место (x;y)

Например: 4=-3*(-2)+b, найдите b, а затем нарисуйте график.

Я отправила вам фото. Там всё написано и график тоже

Answer:

14.62 I believe

Step-by-step explanation:

Answer:

1,0

Step-by-step explanation:

No need to expand look at the roots of the brackets.

(x-1)=0

x=1

x^2 and -9x have roots 0

Think of it as whatever sets the expression to 0.

Answer:

5 (x+2) +2x is equal to 7x + 10

Step-by-step explanation:

To find the value of this equation you would have to apply the distributive property by changing 5 (x+2) to 5x +10. (When applying the distributive property you will always multiply the numbers in the parentheses by the number on the left of it). Then you would combine like terms by adding 2x and 5x together. You will then have 7x + 10.

Step-by-step explanation:

1.) Distribute = 5x+10

2.) Collect Like-Terms = 5x & +2x

3.) Add 5x and +2x , which = 7x

Now you have your answer, which is: 7x + 10.

I hope this helped.

Answer:

6,270

Step-by-step explanation:

hope this helps

Answer:

Let AB is the height of the cliff = H and p is the posit ion of the boat.Angle of depression= angle of elevation= 15 degrees therefore angle APB= 15 degrees tan 15=AB=h/1,000 h=(1,000)*tan 15=(1,000)(0.26794919243112)=268.94919243112 meters or

Simply: 268meters..........Ans

Answer:

Step-by-step explanation:

idek

Answer:

(4, 2) the formula for 270 rotation counterclockwise is (y,-x)

Step-by-step explanation:

Answer: the area of the resulting surface is π/16 [ 4√(17)  + In( 4 + √( 17)) ]

Step-by-step explanation:

Given that;

y = e^(-4x),  x ≥ 0

then, dy/dx = -4e^(-4x)

now, √( 1 + (dy/dx)² ) = √( 1 + ( -4e^(-4x))²) = √( 1 + 16e^(-8x)

so the surface area of the surface obtaining by rotating the curve y = e^(-4x) on ( 0, ∞ ) about x-axis is,

S = ₀∫^∞ 2πy √( 1 + (dy/dx)² )  dx

S = ₀∫^∞ 2πe^(-4x) . √( 1 + 16e^(-8x) dx

S = 2π. ₀∫^∞ e^(-4x) . √( 1 + 16e^(-8x) dx

so LET 4e^-4x = u ⇒  -16e^(-4x) dx = du

⇒e^-4x dx = du/ -16

so whenx = 0, then u =4 and when x → ∞ then e^(-4x) → 0 so u →0

therefore

S = 2π ₄∫⁰ √(1 + u²) . du/-16

= π/8 ₀∫⁴ √(1 + u²) . du

= π/8 [ u/2√(1 + u²)  + 1/2 In ( u + √( 1 + u²) ]₀⁴

WE MAKE USE OF

∫√( a² + u²) du = u/2√(a² + u²) + a²/2 In ( u + √( a² + u²)) + C

so

= π/8 [ 4/2√(1 + 16)  + 1/2 In ( 4 + √( 1 + u16 ]

= π/8 [ 2√(17)  + 1/2 In ( 4 + √( 17)) ]

= π/16 [ 4√(17)  + In( 4 + √( 17)) ]

therefore the area of the resulting surface is π/16 [ 4√(17)  + In( 4 + √( 17)) ]