Mathematics High School

PLEASE HELP ME I HAVE THIS TEST DUE SOON <3

which equation is perpendicular to y= -2x + 5 ?

A) y= -2x -5
B) y= 2x -3
C) y= 1/2x -2
D) y=-1/2x+1

Answers

Answer 1
Ok so in order for the equation to be perpendicular, the slope have to be opposite of each other.

The original equation had -2 as the slope. The opposite of -2 is 1/2.

When the number is negative, the opposite of it is positive.
And in order for them to be completely opposite, you have to flip the number. So 2 turned into 1/2, since the denominator of 2 is 1.

And so since the opposite slope is 1/2, C is the correct answer.

Related Questions

7/16 in decimal form​

Answers

Answer:

0.4375

Step-by-step explanation:

What is the mathematical
representation of 20P4?

Answers

the answer for 20p4 is c

The mathematical representation of 20P4 is [tex]^{20}P_4 = 20 \times 19 \times 18 \times 17[/tex]. so option C is the correct.

How many ways k things out of m different things (m ≥ k) can be chosen if order of the chosen things doesn't matter?

We can use combinations for this case,

The Total number of distinguishable things is m.

Here, Out of those m things, k things are to be chosen such that their order doesn't matter.

This can be done in total of

[tex]^mC_k = \dfrac{m!}{k! \times (m-k)!} ways.[/tex]

If the order matters, then each of those choice of k distinct items would be permuted k! times,

So, total number of choices in that case would be:

[tex]^mP_k = k! \times ^mC_k = k! \times \dfrac{m!}{k! \times (m-k)!} = \dfrac{m!}{ (m-k)!}\\\\^mP_k = \dfrac{m!}{ (m-k)!}[/tex]

This is called permutation of k items chosen out of m items (all distinct).

We have to find the mathematical representation of 20P4.

[tex]^{20}P_4[/tex]

here, m = 20

k = 4

Now substitute;

[tex]^mP_k = \dfrac{m!}{ (m-k)!}\\\\^{20}P_4 = \dfrac{20!}{ (20-4)!}\\\\^{20}P_4 = \dfrac{20!}{ (16)!}\\\\\\^{20}P_4 = \dfrac{20 \times 19 \times 18 \times 17 \times 16!}{ (16)!}\\\\\\^{20}P_4 = 20 \times 19 \times 18 \times 17[/tex]

Hence, the mathematical representation of 20P4 is [tex]^{20}P_4 = 20 \times 19 \times 18 \times 17[/tex]. so option C is the correct.

Learn more about combinations and permutations here:

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cual es la superficie de un rectangulo de 10 cm por 4 cm?​

Answers

Answer:

10x4=40

Step-by-step explanation:

se calcula multiplicado la base por la altura luego de haber multiplicado esto (10 x 4) el resultado es 40

Find, to the nearest foot, the length of the diagonal of a square whose side is 10 feet.
Draw a square to help solve the problem. (Remember to round answer to the nearest
foot, no decimals)

Answers

the length of the diagonal is 14 feet

Just answers/Get all 3 correct and will give Brainliest!

Answers

Answer:

4sqrt3 (the third answer), No, All of the statements are true (I think)

Step-by-step explanation:

The circumference C of a circle with radius r can be calculated using the formula C=2nr which formula represents r in terms of C?

Answers

Answer:

r=C/2Pi

Step-by-step explanation:

C=2(Pi)r

r=C/2Pi

When the puppy turned 12 months old it weighed 19.6

Answers

Answer:

#&*#*#

Step-by-step explanation:

what typa dog is it???

Did I get this correct? If not please help me!!!

Answers

Answer:

I thinck u did get it write ....

Step-by-step explanation:

What is the domain? F(x)= 3x^2-2x-1/ x^2+3x-10

Answers

Domain:
(
−
∞
,
∞
)
,
{
x
|
x
∈
R
}

Create a model to represent the following percents.
a. 90% b. 0.9% c. 900% d. 910%

Answers

Answer:

90%

Step-by-step explanation:

90%

is the correct answer

Can somebody help???

Answers

6.52 and 6.67...............................

Answer:

first one I am thinking 6.52 and the second one I am thinking 6.67

Step-by-step explanation:

Hope this Helps!!!

7. (07.03) An equation is shown below: 4(2x - 5) + 15 = 11 Write the steps you will use to solve the equation and explain each step. (5 points)​

Answers

Answer:

x = 2

Step-by-step explanation:

[tex]4(2x-5)+15 = 11 => 4(2x-5) = 11 - 15 => 4(2x-5) = -4 => 2x-5 = \frac{-4}{4} => 2x-5 = -1 => 2x = -1 + 5 => 2x = 4 => x = 2[/tex]

The value of x is 2 for equation 4(2x - 5) + 15 = 11

What is Equation?

Two or more expressions with an Equal sign is called as Equation.

The given equation is 4(2x - 5) + 15 = 11

Four times of two x minus five plus fifteen equal to eleven

4(2x - 5) + 15 = 11

Apply distributive property on the LHS

8x-20+15=11

8x-5=11

Add 5 on both sides

8x=16

Divide both sides by 8

x=2

Hence, the value of x is 2 for equation 4(2x - 5) + 15 = 11

To learn more on Equation:

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as the number of comics increases, the cost___

Answers

Answer:

As the number of comics Increases the cost increases

Answer:

increases.

Step-by-step explanation:

The line is climbing higher, and it means that the copies of comics are being sold more and the prices are becoming higher.

Hope this helps!! Have an amazing day ^^

9(8s - 5f) use f = 3 and s = 4

Answers

Answer:

153

Step-by-step explanation:

8x4=32

5x3=15

32-15=17

9x17=153

Answer:

fhmjjjjj hjk, k

Step-by-step explanation:

3) Sidney brought x carrots to school and combined them with Jenan's j carrots.
She then split them equally among 8 friends. *

Answers

Answer:

each person got (x + j) / 8 carrots

Step-by-step explanation:

PLEASE HELP IM ON A TIME LIMIT

What is the location of point D

(6, 0)
(-6, 0)
(0, -6)
(0, 6)

Answers

Answer:

The answer is (0,-6)

Answer:(0, -6)
Explanation: it goes over 0 that’s how you know the x and it goes down -6 that’s how you know the y

Solve for x. Show your work.

34x-5 = (1/27) 2x+10

Answers

Answer:The answer in a fraction is 405/916 and the decimal form is 0.44213973

…

Step-by-step explanation:

Answer:

34x-5 = 2x/27+10

or, 34x-5=(2x+270)/27

or, 918x - 135=2x+270

or, 918x-2x=270+135

or, 916x= 405

or, x = 0.44

James wants to build a frame around a circular clock like the one shown. He is trying to determine how much material he needs to wrap around the clock. Determine the circumference if the radius is 12 inches. Round your answer to the nearest tenths. Use ≈3.14.

Answers

Answer:

22

Step-by-step explanation:

Just did it

Which point is the outlier on this scatter plot?
Shark Size
y
3
300
Length (cm)
200
100
X
0
0
30
60
90
Mass (kg)
OA (0.07, 18)
O D. (105, 320)
O C. (85220)
O B. (68, 165)

Answers

The answer to this problem is A

Answer: A (0.07, 18)

Step-by-step explanation:  An outlier is a value that is far from the central tendencies around what would be the mean and the median values.

In a scatter plot, it's the dots (coordinates) that are far away from the main cluster.

you get 10 points for answering and brainliest
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! plz answer correctly

Answers

the radius of the circle to the nearest centimetre is 5. now, to work out the area of a circle it’s radius squared x pi. so 5 squared is 25. 25 x pi is approximately 78.54, or you could just leave it as 25pi. hope this helps ;)

Josh can long-jump 195% of his height with a running start. If Josh is 66 inches tall, how far can he long-jump?

Answers

Answer: 128.7 inches

Step-by-step explanation:

Josh's height is 66 inches.

When he jumps with a running start, he can jump as far as 195% of his height.

The length he can jump is therefore 195% multiplied by his height:

= Josh height * 195%

= 66 * 195/100

= 128.7 inches

Answer: 128.7

Step-by-step explanation: I've done this question before

Molly has two less than three times as much money as Ben. If Molly has $40.96, how much money does Ben have

Answers

Answer:

$61.44

Step-by-step explanation:

Molly. Ben

2x. 3x

40,96÷2x

=20.48

Ben's money

3(20.48

=$61.44

Please help I’m failing math and I might get held back

Answers

Answer:

[tex]tan 56 = \frac{26}{x}[/tex]

Step-by-step explanation:

[tex]tangent = \frac{opposite}{adjacent}[/tex]

Side z is the hypotenuse, since it is opposite the right angle.

Side x is the adjacent, since it is next to the angle you are solving for.

The side measuring 26 is the opposite, since it is opposite the angle you are solving for.

A door is 6 feet 6 inches high and 38 inches
wide.Can a thin mattress, 7 feet wide, be carried
through the door diagonally? How do you know
for sure?

Answers

The mattress can fit through the door.
The door is 78 inches tall and 38 inches wide. If you do the Pythagorean theorem with these numbers you get the hypotenuse of 86.76, which is larger than the width of the mattress.
38^2+78^2=c^2
1444+6084=7528
Take square root of 7528, which is 86.76

please help me:) appreciated :) have a good day!!​

Answers

the answer is the second one cuz the total cost = dinner + tip

Help a girl out plssss and show the work I will literally love u

Answers

Answer:

x=9

Step-by-step explanation:

[tex]\frac{x+6}{x} =\frac{20}{(20-8)} \\1+\frac{6}{x} =\frac{20}{12} \\\frac{6}{x} =\frac{20}{12} -1\\\frac{6}{x} =\frac{20-12}{12} \\\frac{6}{x} =\frac{8}{12} \\8x=6 \times 12\\8x=72\\x=\frac{72}{8} =9\\x=9[/tex]

Answer:

9

Step-by-step explanation:

The left side of the triangle is 20 units long, the bottom portion is 8 units long.

This means the top portion must be 12 units long, 20 - 8 = 12.

The ratio between the left and right side has to be the same because they are two straight lines.

So if the ration is 8 to 6 or 8/6 which reduces to 4/3 then your ration is 12 to x.

So if... 4/3x=12 then

(3)4/3x = 12(3) multiply both sides by 3

4x = 36 the divide both sides by 4

x = 9

To check you can multipy your answer, in this case 9 by 4/3.

(9)(4/3)  =

(9 x 4)/3 =

36/3 = 12

You did it! Hope this helped.

Which of the following ratios are not equivalent to 7 : 3?

Multiple choice question.

A)
14 : 3


B)
14 : 6


C)
21 : 9


D)
28 : 12

Answers

A is not equivalent to 7:3
A is not equivalent.

Sam wants a television.He can either buy or rent it.The cost of buying it is $960.Sam would pay a deposit of 30% followed by 12 equal month after payments.
1)Calculate the deposit. 2)Calculate each monthly payment.​

Answers

1.) 288
2.) 56

The deposit would be 960x.30 = 288
Monthly payment would be 960-288= 672
672/12= 56

Answer:

1.  deposit = $288

2. monthly payments = $56

Step-by-step explanation:

960 x 0.3 = 288

960 - 288 = 672

672/12 = 56

Find the value of x that makes the equation true. 12x=4(x+2)+20

Answers

Answer:

7/2

Step-by-step explanation:

12x=4(x+2)+20

12x=4x+8+20

12x-4x=8+20

8x=28

x=28/8

simplify

x=7/2

w
Dan's circular
pool has a
circumference of
18.84 meters.
What is the
diameter of the
pool?
(use
13.14)
IS

Answers

Answer:

6 Meters

Explanation:

Diameter = Circumference ÷ π

Circumference: 18.84

π: 3.14

18.84 ÷ 3.14

= 6 Meters
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