what is the slope of the points (20,-3) and (19,-20)

Step-by-step explanation:

12a. y-y1=m(x-x1)

y-5=(2-5)/(1--3)(x--3)

y-5=-3/4(x+3)

4y-20=-3x-9

4y=-3x-9+20

4y=-3x+11

y=-¾x+11/4

12b.

Perpendicular lines have the product of their gradient equal to -1

For L1,the gradient is 3

For L2,we express in slope-intercept form

6y=1-2x

y=1/6-⅓x

The slope is -⅓

Now product of both slopes 3×-⅓=-1,thus the lines are perpendicular

Answer:

Answers in Explanation

Step-by-step explanation:

First Question:

[tex]\sqrt{100}[/tex] + [18 ÷ 3 x 4 - 15] - (60 - 7^2 - 1)

[tex]\sqrt{100}[/tex] + [24 - 15]  - (60 - 49 - 1)

[tex]\sqrt{100}[/tex] + 9 - 10

10 + 9 - 10

Answer = 9

Second Question:

5x + 2x = 7x

5x^2 + 3x^2 = 8x^2

2x + 3x - x = 4x

2x + 3y + x + y = 3x + 4y

9x - 6x = 3x

-7y + 3x + 4x + 3y = 7x - 4y

-7x^2 + 2x^2 + 9x^2 = 8x^2

(3x^2 + 5x + 4) - (-1 + x^2) = 2x^2 + 5x + 5

(3 + 2x - x^2) + (x^2 + 8x + 5) = 10x + 8

(3x - 4) - (5x + 2) = -2x - 6

(2x^2 + 5x + 3) - (x^2 - 2x + 3) = x^2 + 7x

(3x^2 + 2x - 5) - (2x^2 - x - 4) = x^2 + 3x - 1

Third Question:

17x + 2y

(5x + 12y) + (3x + y) = 8x + 13y

17x - 8x = 9x

2y - 13y = -11y

Answer: 9x - 11y

Answer:

B is going to be our answer

Step-by-step explanation:

We said that we want each row to contain 40 beets

We divided and got 195 rows, with a remainder of 15.

This makes statement B true.

I believe it's 45°........

Answer:

i reallyy wanna sayyyy 45

Answer:

2.25

Step-by-step explanation:

1.50+50%=2.25

Answer:

196.88

Step-by-step explanation:

looked up

Answer:

y = 1/2 (x-3) ^2

Step-by-step explanation:

I hope this helps!

Answer:

Each piece will be 8 inches

Step-by-step explanation:

We have to find the HCF / GCF of  80 and 64

80 = 2 * 2 * 2 * 2 * 5

64 = 2 * 2 * 2 * 2 * 2 * 2

HCF = 2 *2 *2 = 8

80 inches = 8 * 10 . So, 10 boards each measuring 8 inches

64 = 8 * 8 . So, 8 boards each measuring 8 inches

Step-by-step explanation:

There are 2 ways we can do this. We can use our friend which we will call a special device or we could actually solve using formulas we already know. Today, I will be using a formula but you can easily just use the secret device.

Step 1: Knowing the formula which is multiply miles by 1.609 and then round to the nearest tenth or hundredth.

13.5 X 1.609 = 21.7215.

Round down to 21.7.

Final Answer: 21.7 Km is equal to 13.5 miles or vice versa.

Answer:

-4 9/10, -4 3/4, -4.2

Step-by-step explanation:

A. -4.9

B. -4.75

C. -4.2

ANSWER:

-4 9

10

-4 3

10

-4.2

Step-by-step explanation:

HOPE IT HELPSSSS

Answer:

I won't tell you the answer but if you read the solution, you would understand it.

Step-by-step explanation:

81^3/4 is basically 3 times the fourth root of 81. What number multiplies 4 times to make 81? Then multiply that by 3.

Now we have the cube root of 27. If you have a fractional exponent with no numerator, that just means square root, cube root, fourth root.

Eg. the exponent 1/4 would just mean fourth root

Eg. The exponent 1/2 would just mean square root

The cube root of 27 is 3.

The denominator is 3 times 2 to the third power.

PEMDAS

Order of Operations tells us we do exponents first so 2 to the third power is 8 and multiply by that 3.

You have all the information you need. Now just use your arithmetic skills! Let me know if you need more help.

Answer:

120m2

$6.25

$4.50

85

57

12

12

32

54

69

87

89

12

34

58

Step-by-step explanation:

the last one..

The number of hamburgers in each picture will always be odd.

hope this helps you.

boberson is after then my mom

Answer:

(0, -3) is good, good luck for you

Answer:

y = x - 5

Step-by-step explanation:

y = x - 5

10 = 5 - 5

10 is not equal 0

Answer:

y = x - 5

Step-by-step explanation:

y = x - 5

10 = 5 - 5

10 is not equal 0

Answer:

y = - [tex]\frac{1}{2}[/tex] x + 8

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 2x + 1 ← is in slope- intercept form

with slope m = 2

Given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{2}[/tex] , then

y = - [tex]\frac{1}{2}[/tex] x + c ← is the partial equation

To find c substitute (4, 6 ) into the partial equation

6 = - 2 + c ⇒ c = 6 + 2 = 8

y = - [tex]\frac{1}{2}[/tex] x + 8 ← equation of line

=》2x = 9

=》x = 9/2

=》x = 4.5

■ Take all the numbers to the right side leaving the variable alone on the the other side of the equation & then simplify it.

_____

RainbowSalt2222 ☔

Answer: 1:9

Step-by-step explanation:

If you multiply 2 legs times 8 chickens we get 16

If you multiply 4 legs times 14 sheep we get 56

The number of legs is 16+56=72

So you have 8 beaks and 72 legs or 8:72

Divide both sides by 8 to simplify and you get 1:9 as the answer

Answer:

x>=9

Step-by-step explanation:

so, we can plot this on a number line

the point at 9 is a solid dot, since brackets (not parenthasis) indicates that we including the number. the shaded part of the line extends all the way to positive infinity. the shaded part means that it is a solution, while the un-shaded parts aren't solutions to [9,infinity) it is x>=9 and not x>9 because 9 is included.

x>=9 is the answer

Answer:

x= 1 and y =1

Step-by-step explanation:

4+4 is 8, therefore for this to be true both must be 1

Answer:

x = 1; y = 1

Step-by-step explanation:

We know x and y have to equal the same thing because 4 + 4 = 8

x = 4 / 4

y = 4 / 4

x = 1

y = 1

Therefore, x = 1; y = 1

Answer: 3

Step-by-step explanation: if you look where the line exactly touches the graph divide the left number to the bottom number let me know if its right

Answer:

3 recipes/week

Step-by-step explanation:

Pick any two points where the line passes to a point in the grid, so you don't go crazy with counts. That means (0.0) (1;3) (2;6) (3;9) Pick two of them, in order. Let's say we like (0.0) and (1.3) since we're lazy. Now let's subtract the second part of each pair, (in our case, 0-3), do it for the first pair (in our case 0-1) and divide the two results: [tex]{-3 \over -1} = 3[/tex] Feel free to pick any other two and double check, being careful you're always doing [tex]\Delta y \over \Delta x[/tex]

Answer:

0.01085 ~ 1.085%

Step-by-step explanation:

Okay so a simple way to do these probability ones is to add an extra space around each side

                      YES          NO

POSITIVE       325           2        _____

NEGATIVE       16          1131      _____

                     _____    _____   _____

Now in these spaces add all the the rows and columns accordingly

                      YES          NO

POSITIVE       325           2        _327_

NEGATIVE       16          1131      _1147_

                     _341_     _1133_   _1474_

Now the number in the place where the additional rows meet is your total number of patients, so this is what you would use for your probability.

So we are looking for YES / NEGATIVE which is 16

Now do 16 divided by 1474 and your probability comes out to 0.01085..., so as a percentage, would be 1.085%

Hope that helped :)

Answer:

$9.00

Step-by-step explanation:

We can use conversion factors to solve this equation. The multiplication sequence that I got is shown below:

[tex]\frac{3ft}{1}[/tex] × [tex]\frac{12 in}{1ft}[/tex] × [tex]\frac{0.25}{1in}[/tex]

Our feet and inches cancel out and we get the final expression [tex]\frac{3*12*0.25}{1}[/tex], which is equal to 9, or $9.00.

Hopefully that was helpful! :)

Answer

n=5

Step-by-step explanation:

n is equal to five

Answer:

5.1

Step-by-step explanation:

Answer:

36

Step-by-step explanation:

x + (1/2)x + 5 = 59

1.5x = 54

x = 36

Answer : 25%

Step-by-step explanation : If a coin was tossed 80 times and it landed 60 times, 80 - 60 = 20 so 20/80 were tails, let's convert that into % so 20 is 1/4 of 80 so 25%.