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Crank
3 years ago
13

20 people show up to a post-PSTAT 120A party. If everyone shakes hands with everyone else, how many handshakes take place

Mathematics
1 answer:
Ierofanga [76]3 years ago
7 0

Answer: There are 190 handshakes takes place.

Step-by-step explanation:

Since we have given that

Number of people in the party = 20

Here, n = 20

So, the number of handshakes would be

\dfrac{n(n-1)}{2}\\\\=\dfrac{20(20-1)}{2}\\\\=\dfrac{20\times 19}{2}\\\\=10\times 19\\\\=190

Hence, there are 190 handshakes takes place.

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Find the cost of 5 Kgs of apples using the data given in the graph.
zzz [600]

Answer:  2.50 dollars

Explanation:

Locate 5 on the x axis, which corresponds to buying 5 kgs of apples.

Draw a vertical line through 5 on the x axis until you reach the blue line. Mark this as point P.

From point P, draw a horizontal line until you reach the y axis. You should arrive at y = 2.5

This tells us that buying x = 5 kgs of apples will cost a total of y = 2.50 dollars.

6 0
3 years ago
Which equation represents h(x)?
GarryVolchara [31]

Answer:

Step-by-step explanation:

You might find this easier if you change h(x) to y. It might look more familiar.

you are given 1 point and that is (-1,1). What that means is when x = -1,

y = 1

You have written this as though y is linear. It is not. The power is 1/3, not 1.

Let us try B which is what I think the answer is.

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

Put x = -1 on the right hand side.

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

y = (1)^(1/3)            

The cube root of 1 is 1.

So the answer is

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

8 0
3 years ago
How do u get the area of a circle?
galina1969 [7]

Answer: πr^2

Step-by-step explanation:

π is pie which is about 3.14

but you need to find the radius and square it is multiply it by itself (Example radius = 2 so 2x2=4)

then multiply the radius squared by π(pie) which is 3.14 or use a calculator.

7 0
3 years ago
Read 2 more answers
Eli's Electronics has 60-inch television on sale this week for $798. The television is regularly priced for $1050. By what perce
umka2103 [35]

Answer: that would be 76% hope that helps



Step-by-step explanation:


3 0
3 years ago
What is the solution to the system of equations 2x-y=7 and y=2x+3
Yuri [45]
Make y the subject in both equations

2x-y=7

-y=-2x+7

y=2x-7

For the second equation

y=2x+3

The two equations are parallel because they have the same gradient or slope but different y intercepts.

This type of equations have no solution because they will never intersect.

NO SOLUTION

The correct answer is C
6 0
3 years ago
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