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Gekata [30.6K]
3 years ago
15

How many different ways can teams of four members be formed from a class of 20?

Mathematics
1 answer:
guapka [62]3 years ago
4 0
Assuming you want to choose 4 people from the class of 20; 

Begin by using the combinations formula; 

20C4=4845 possibilities 

Hope I helped :) 
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A library building is in the shape of a rectangle. Its floor has a length of (3x + 5) meters and a width of (5x − 1) meters. The
AleksAgata [21]
The problem says that the expression (3x + 5)(5x − 1) <span>represents the area of the floor of the building in square meters. Therefore,  to solve this problem you have to follow the proccedure shown below.

 1. First, to simplify the expression (3x + 5)(5x − 1) you must apply the distributive property. Then, you obtain:

 15x</span>²-3x+25x-5

 2. Then, you have:

 15x²+22x-5

 3. As you can see, the correct answer is the last option:  15x²+22x-5
7 0
3 years ago
What is the y-intercept of the following equation?<br> y=x2-3x-4
-BARSIC- [3]

Answer:

y- intercept is ( 0, -4 )  

Step-by-step explanation:

5 0
3 years ago
I need help on this question?​
Lera25 [3.4K]
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8 0
2 years ago
John has a map that shows a rectangular park 1 1/4 cm : 8 yd. on the map, the width of the park is 2 1/2 cm. What is the parks a
Ber [7]

Answer:

16 yd.  This is the park's actual length.

Step-by-step explanation:

Write and solve an equation of ratios:

1 1/4 cm     8 yd

------------ = -----------

2 1/2 cm        x

Note that 2(1 1/4 cm) = 2 1/2 cm, so the above equation becomes:

 1       8 yd

----- = ---------

  2         x

Solving for x, we get x = 16 yd.  This is the park's actual length.

3 0
3 years ago
I need the answer to y=2x+7 in a graph and passes through (3,3)
nevsk [136]

The slope-intercept form is y = 2x-3.

<u>Step-by-step explanation</u>:

Given,

  • The equation of the line is y=2x+7.
  • The general equation of the line is in the form y= mx+c.
  • where 'm' represents the slope of the line.

<u>Comparing the given equation with general equation, it can be determined that</u> :

m = 2 and c = 7 (y-intercept).

The given line passes through the point (3,3) which is equal to (x1,y1)

Therefore, x1=3 and y1=3.

Substitute m=2 and the values of (x1,y1) in the slope-intercept form,

The slope-intercept form is (y-y1) = m (x-x1)

(y-3) = 2(x-3)

y = 2x-6+3

y = 2x-3

4 0
3 years ago
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