2.) Of a classroom filled with 20 students, 2 will be selected to stay after school and correct
homework for extra credit. How many combinations are possible?
A.) 190
B.) 210
C.) 63
D.) 40

Answers

Answer 1

Answer:

190

Step-by-step explanation:

20C2 = (20*19)/(1*2) = 190


Related Questions

please help me with this

Answers

Answer:

It's C, if it's not that one than it's A but I'm 99% sure it's C!!I'm sorry if it's wrong

Step-by-step explanation:

trust

PLEAS HELP I NEED HELP AND ITS ALMOST TIME TO TURN IT IN SO HELP ME PLS

Answers

Answer:

I think its 5 [tex]\frac{1}{3}[/tex]

Step-by-step explanation:

A puppy named Taffy started out at 5 pounds and gained 2 pounds every month.what is the slope????

Answers

Answer:

y=2x+5   slope: 2

Step-by-step explanation:

Ok so basically we know that Taffy started out with 5 pounds. And then as every month progressed she got 2 more. Meaning you are adding to the 5 pounds she started out with. Slope is a rate and in this case it's per month she gets 2 more! Hope that makes sense  


Make x the subject of the formula
y = (ax)2

Answers

Answer:

y = (ax)2

y = 2ax

divide both sides by 2a to make x the subject of the formula.

y/2a = 2ax/2a

x = y/ 2a

hope this was helpful,thanks

Mark brainliest!!


The image shows quadrilateral ABCD

Prove that quadrilateral ABCD
is a square.

Find the perimeter of ABCD. Explain or show reasoning

Find the area of ABCD. Explain or show reasoning.

Answers

Answer:

16, Each side of the sqaure is 4 sq. units. 4+4+4+4=16 The area is also 16. 4x4=16

Step-by-step explanation:

The proof that shows that the quadrilateral is a square is from that fact that all of the sides have the same length.

The perimeter of the quadrilateral is given as

4+4+4+4 = 16

The area of the quadrilateral

4L = 4X4 = 16

Hence it has being proven that the area and the perimeter of the shape is 16 hence this shape can be said to be a square.

Read more on quadrilaterals here:

https://brainly.com/question/23935806

#SPJ2

Evaluate the expression below if a = -8, b = 17, and c = 21. a^2-(b+c)

Answers

Answer:

26

Step-by-step explanation:

a^2-(b+c)= (-8)^2-(17+21)=64-38=26

if ab=12 and a^2+b^2=25 ,then what is (a+b)^2=​

Answers

Answer:

I think it’s a^2+2ab+b^2

Answer:

49

Step-by-step explanation:

Multiply out (a+b)^2

(a+b)^2 = (a+b)(a+b) = a^2 + ab + ba + b^2 ; not ab = ba so,

= a^2 + 2ab + b^2 = a^2 + b^2 + 2ab ; now subtitue in given values

=25 + 2(12) = 25 + 24 = 49

So (a+b)^2 = 49

Please need help 20 points

Answers

Answer:

what type of math is this?

Step-by-step explanation:

Hi. I don’t know what the answer for this equation. Can somebody help me? Thanks.


Which is the reflection line for the transformation
shown?
1. x-axis
2. y-axis
3. x= -2
4. y = -2

Answers

Answer:i think it is the y-axis

Step-by-step explanation:

HELPPPPPP. If the slope of a line through the points (-2,5) and (3, b) is -1, what is the value of b? ​

Answers

Answer:

(C)  b = 0.

Step-by-step explanation:

Slope = (b - 5) / (3 - (-2)) = -1

(b - 5)/ 5 = -1

b - 5 = -5

b = -5 + 5 = 0.

The ratio of quarters to dimes in a money bag is 21:18. If the total number of coins is 147,how many dimes are there?

Answers

21 + 18 = 39

147/39 = 3.7692307692307

3.7692307692307 x 18 = 67.846153846152, round to 67.80 and that's your answer

HELP I AM TAKING A MATH TEST!

-10-(-3)=? explain how you solved this is 2 or 3 sentences

Answers

Answer:

-10-(-3)

Step-by-step explanations

we have-10-(-3). since law of basic operation:

+*+=+

-*-=+

so we have-10(-*-=+)

so we have-10+3

There are 5 boxes and each box weighs x pounds. Write the expression for the total weight of the
boxes.

Answers

Answer:

5x pounds

Step-by-step explanation:

Here's the solution if you need, hope it's help

pls help i'll give brainliest. Write an equation that represents the line.

Answers

Answer:

y=2/x=1    y=4/x=4

Step-by-step explanation:

Calculate.

[tex]\sqrt{(-4.5)^{4}}[/tex]

Answers

Answer:

Step-by-step explanation:

[tex]\sqrt{(-4.5)^{4}}=\sqrt{(-4.5)*(-4.5)*(-4.5)*(-4.5)}\\\\= (-4.5) * (-4.5)\\\\= 20.25[/tex]

The cost of laying wood floors consists of a base price of $250, plus $3.50 for each square foot installed. Write a function that represents the total cost of installing wood floors.

Answers

Answer:

Let s = each square foot of wood installed

Step-by-step explanation:

Total cost of laying wood = base price + price for each square foot installed

Base price = $250

Price for each square foot installed = $3.50

Let

s = number of each square foot installed

Total cost of laying wood = $250 + $3.50s

The correct answer is

Let s = each square foot of wood installed

answer please help me out

Answers

Answer:

Hey just search up an algebraic calculator I finished my homework with it lol

Step-by-step explanation:

select all of the expressions that are equivalent to 5% of 60 .
Pls help ASAP

Answers

Answer:

Third, fourth, and fifth

Step-by-step explanation:

basically every one has the 60 and a different form of 5%

Answer:

c, d, e

Step-by-step explanation:

5% of 60 is 3 and c, d, e all equal 3

A company charges a shipping fee that is 4.5 % of the purshas price for all items it ships . What is the fee to ship an item that costs $56 ?

Answers

Answer:

The answer is $2.52.

Step-by-step explanation:

56 x .045= $2.52

Find the value of the coins after 10, 20, 30, and 60 years. Use the function you identified in question 3 to calculate the value. (8 points: 1 point for each time interval)
pls answer the question correctly 20 points and give you brianlist if you answer it right and not put some dum answer

Answers

Answer:

Answer:

Coin A:

10:$46.18

20:$96.74

30:$190.31

60:$1448.66

Coin B

10:$65.16

20:$106.13

30:$172.88

60:$466.98

Coin C

10:$88.81

20:$131.47

30:$194.60

60:$631.18

Step-by-step explanation:

I think these are right. I've rounded the answers to the nearest 10th place.

Answer:

look up

Step-by-step explanation:

AND GIVE HIM BRAINLIEST HE DESERVES IT!

raise g to the 3rd power, then divide f by the result

Answers

Answer:

Step-by-step explanation:

g^3

f / g^3

solve pls brainliest

Answers

Answer:

y=15x

Step-by-step explanation:

Plug in the numbers given and the equation works.

Can someone please help?!

Explain step by step of how you would find the scale factor for the following problem.

Answers

Answer:

Scale factor = 2.5.

Step-by-step explanation:

Work out the lengths of the corresponding sides.

The scale factor is the ratio of one side to the other.

Take the smallest length in both triangles.

Blue triangle:

length = √((7.5-2.5)^2 + (12.5-5)^2) = 9.0139 units.

Red triangle:

length = √((3-1)^2 + (5-2)^2) =3.6056

So the scale factor

= 9.0139/ 3.6056

= 2.5.

︎help me please ineed answer asp thankyou​

Answers

Answer:

Look below

Step-by-step explanation:

I'm going to use B as my example to explain: B (-3,4)

You are going to need to draw a coordinate plane. When drawing the X axis, you want the highest X point to be 6 due to the fact that that is your highest x value. Then you want the lowest X point to be -6. Same will apply with the Y axis.

Next you are going to put a point in the middle of the plane which is called the origin (0,0).

Going from the origin, you want to follow the x axis the get to -3 which will be going left since its negative. Then since the Y axis is vertical, you are going to go up 4 times since the 4 is positive.

Then start from the origin for the next point being C (-5,4), Remember to always start from the origin.

Evaluate: [(1/2)^2-(1/4)^3]​

Answers

Answer:

15/64

Step-by-step explanation:

Evaluate:

[(1/2)²-(1/4)³]

We have to find the value of expression ?

Explanation:-

Given that

[(1/2)²-(1/4)³]

⇛ [{(1/2)×(1/2)}-{(1/4)×(1/4)×(1/4)}]

⇛ [{(1×1)/(2×2)}-{(1×1×1)/(4×4×4)}]

⇛ [(1/4)-(1/64)]

LCM of 4 and 64 = 64

⇛ [(1×16)-(1×1)]/64

⇛ (16-1)/64

⇛ 15/64

The value of the given expression is 15/64.

Which of these functions is a transformation of the function f(x) = 3^x where the function is translated 2 units to the right and horizontally stretched by a factor of 4?

A: g(x)= 3^(1/4x - 1/2)

B: g(x)= 3^(1/4x + 1/2)

C: g(x)= 3^4x - 8

D: g(x)= 3^4x +8

Answers

Answer:

A: g(x)= 3^(1/4x - 1/2)

Step-by-step explanation:

A.  translated 1/2 units to the right and horizontally stretched by a factor of 4

(If question is  translated 2 units to the right, there is no solution in all 4 options)

I don’t know how to do this question pls help

Answers

Answer:

Step-by-step explanation:

Triangle P is mapped onto Q so P is the initial triangle that will transformed.

We can rotate counterclockwise 90° but we cannot do it about the origin (0,0) because the red point (5, 1) will end up at ( -1, 5) .

We see that the point (5, 1)  ends up at ( -2, 4) so the center of rotation is lower than the origin.

The transformation is rotation of 90° about the point (0,-1)

Plz help fast.
I will mark Brainlyist

Answers

I included the formula and the answer

the ball started at the 5 yard line. what is the position of the ball after these two plays

Answers

Answer:

you have to show a diagram or I can't help you

6. What is an equation in slope-intercept form for the line that passes through the points and (3, 1)? y= 3x + 1 y=x-3 y=2x + 5 y= 2x - 5​

Answers

Answer:

The correct answer is D) y = 2x - 5

To find the equation of the line, start by finding the slope. You can do this by using the slope formula below.

m(slope) = (y2 - y1)/(x2 - x1)

m = (1 - -3)/(3 - 1)

m = 4/2

m = 2

Now that we have the slope, we can use it along with either point in point-slope form to get the equation.

y - y1 = m(x - x1)

y - 1 = 2(x - 3)

y - 1 = 2x - 6

y = 2x - 5

Answer: y=2x-5

the points are 4 points away from each other vertically, and 2 away horizontally. This makes the slope 4/2 or just 2.

take the slope and go backwards until you hit the y axis and the y-intercept is -5

this means the equation is y=2x-5

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