evulate a^2 - b^2 if a=4 and b= -2

Answer:

Subtraction property of equality (a)

The answer is A because the subtraction property of equality tells us that if we subtract from one side of an equation, we also must subtract from the other side of the equation to keep the equation the same.

Answer

Wow, thanks.

Step-by-step explanation:

I really needed that. Maybe I shouldn't say something personal, but I've been going through a bunch of pointless stress. So thank you, I really found confort through this. I hope you have a good day too. Lots of love and I hope you are safe and happy, wherever you are. No matter who you are, thanks.

:)

(That seal is really is really cute.)

x = 27°

Hi there !

x + 13 + x + 23 = 90

2x = 90 - (13+23)

2x = 90 - 36

2x = 54

x = 54 : 2

x = 27°

Good luck !

Answer:

.33

Step-by-step explanation:

Answer:

(25x * 4y * 2z) + (15x * 2y^3)

10xy(20z + 3y^2)

(if you want working, just comment [too much effort lol])

Answer:

x = -7 y=-23

Step-by-step explanation:

Answer:

She forgot about the negative sign in front of the 3.7, therefore, she added 3.7 to -3.3 which is equals to 0.4

Answer:

x squared -3x-1x+4= x squared -4x+4

Answer:

6^9 over 6^9 is 1

Answer:

$105

Step-by-step explanation:

Answer:

h= 2v / πr²

Step-by-step explanation:

height of a cone is twice of it's volume divided by π and square of radius

Step-by-step explanation:

v = 1/2 πr²h

v / 1/2 πr² = 1/2 πr²h / 1/2 πr² (Divide both sides of the equation by 1/2 πr² to find the formula for height (h).

v / 1/2 πr² = h or h = 2v / πr²

Answer:

Question 1: The negative slope is line j.

Question 2: M's Slope is 1/2.

Step-by-step explanation:

Question 1:

Way 1:

The negative slope is line j because it moves from left to right where the y points decrease while x is increasing.

Way 2:

Finding the slope also finds if it has a negative or a positive slope.

Line j has points (-1,3) and (0,0).

To solve for slope, you have to do (y2-y1)/(x2-x1).  

To substitute the values, it gets to (0-3)/(0-(-1)).

To simplify that, it gets to -3/(0+1) which equals to -3/1. -3/1 in other words is -3.

Since the slope is a negative number, it has a negative slope.

Question 2:

To find the slope of line m, you have to find two points first.

The two points there are is (4,2) and (0,0).

Then you have to use the equation (y2-y1)/(x2-x1).

Once you find the numbers, you plug it into the equation getting (0-2)/(0-4).

To simplify that it gets to -2/-4. That equals -1/-2 once simplifying the fraction.

Since there are negatives in both numerator and denominator, the negative sign gets removed and it becomes 1/2.

Therefore, the slope for line M is 1/2.

Answer:

Step-by-step explanation:

Looking at the first graph, we see that if x increases from 0 to 1, y decreases from 2 to 0:

m = rise / run = -2/1 = -2

Arbitrarily choose the reference point (1, 0).  

Then y = mx + b becomes 0 = -2(1) + b, where b is the y-intercept.

Then b = 2, and the desired equation is

y = -2x + 2  

Answer:

15. slope=-2

y-intercept=2

16. slope=2

y-intercept=1

Step-by-step explanation:

ya kinda dub scalliwag, all you need to do is find the growth factor and starting point

Answer:

42,504 watts

Step-by-step explanation:

154x276hours=42,504watts

Answer:

42504

Step-by-step explanation:

As it uses 154 watt-hours per hour, in 276 hours, it would use 42504 as we would multiply the energy usage by the amount of hours used:

154 watt-hours = 1 hour

276 hours = 42504 watt-hours

276*154 = 42504

Answer: 8 1/4g/cm³

Step-by-step explanation:

Given the graph :

The rate of change in the mass of copper with respect to volume :

To obtain this, we find the slope or gradient of the graph:

Gradient = Δy / Δx = (y2 - y1) / (x2 - x1)

Drawing a right angled triangle on the anybpart of the line of best fit:

y2 = 40 ; x2 = 4.75 ; y1 = 16 ; x1 = 2

(y2 - y1) / (x2 - x1)

= (40 -16) / (4.75 - 2)

= 24 / 2.75

= 2400/275

= 8.727 g/cm^3

Due to unit and graph scale,, the slope is closest to 8 1/4g/cm³

Answer:

c

Step-by-step explanation:

Answer:

the slope should be 4/2

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

Slope (m) =  

ΔY

ΔX

=  

4

1

= 4

θ =  

arctan( ΔY )

ΔX

= 75.963756532074°

ΔX = 4 – 2 = 2

ΔY = 16 – 8 = 8

Distance (d) = √ΔX2 + ΔY2 = √68 = 8.2462112512353

Equation of the line:

y = 4x

When x=0, y = 0

When y=0, x = 0

Answer:

C

Step-by-step explanation:

Keep Change Flip

Keep the first; change divided by multiply; then flip the last

Answer:

$1.85

Step-by-step explanation:

2.15

-1.30

--------

1.85

Answer:

164994

Step-by-step explanation:

Answer:

Its B

Step-by-step explanation:

Answer:

Step-by-step explanation:

The equation takes the form (x - h)² + (y - k)² = r², where  h is the x coordinate, k is the y coordinate of the center and r is the radius of the circle.

The center of circle is the middle of diameter.

The radius is the distance between the center and any point from the circumference of a circle.

The middle of diameter:

[tex]\left(\frac{18+4}2\,;\,\frac{-13-3}2\right)=\left(\frac{22}2\,;\,\frac{-16}2\right)= \left(11\,;-8\right)[/tex]   ⇒ h = 11, k = -8

The distance between the center and point (4,-3)

[tex]r=\sqrt{(11-4)^2+(-8-(-3))^2}=\sqrt{7^2+(-5)^2}=\sqrt{49+25}=\sqrt{74}[/tex]

so the equation:

(x - 11)² + (y - (-8))² = (√74)²

(x - 11)² + (y + 8)² = 74

Answer:

D

Step-by-step explanation:

...

Answer:

(0, -1) I think

Step-by-step explanation:

I have not done this in a while

Hope this helps, though.

Answer:

No this is not linear

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

because if you add -2x and 5 you would get 3 also if you subtract 6x-4 you would get 2x so add 2x and 3x then you would get five

[tex]4+25=2+25[/tex]

They are equal because their sums both equal [tex]29[/tex].

Answer:

4 + 25 is equal to 4 + 25

Step-by-step explanation:

they are equal because both of the equations are the same so that would mean both of the equations would be equal to each other

hope this helps

Answer:

10 weeks

Step-by-step explanation:

Use the equation 180+17w=350

x > 6

Hi there !

1/2 x + ²⁾3 < ²⁾2x - ²⁾6

x + 6 < 4x - 12

6 + 12 < 4x - x

18 < 3x

3x > 18

x > 18/3

x > 6

Good luck !