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yulyashka [42]
3 years ago
14

You and your friends are picking up videos at a video store. You have selected 7 videos but will only have time to watch 3. How

many different ways can you select 3 videos to watch?
Mathematics
1 answer:
spin [16.1K]3 years ago
3 0
There are 21 different ways
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write a system of linear equations that has only one solution. solve the system of equations in two ways.
Iteru [2.4K]
X + 5y = 1 . . . . (1)
8x - 2y = 3 . . . .(2)
Solution 1.
From (1), x = 1 - 5y
substituting for x in (2), we have:
8(1 - 5y) - 2y = 3
8 - 40y - 2y = 3
8 - 42y = 3
42y = 5
y = 5/42
x = 1 - 5(5/42) = 1 - 25/42 = 17/42.

Solution 2.
Multiply (1) by 8, to get:
8x + 40y = 8 . . . . . (3)
(3) - (2) = 40y - (-2y) = 8 - 3
42y = 5
y = 5/42
substitute for y into (3), to get:
8x + 40(5/42) = 8
8x + 100/21 = 8
8x = 8 - 100/21 = 68/21
x = (68/21)/8 = 17/42
7 0
3 years ago
The table below shows the illuminated percentage of the moon on a lunar cycle of 28 days. The relationship can be described usin
natulia [17]

Answer:

The amplitude of the function is 48

The period of the function is 28

The graph has a vertical shift of   48  units.

Step-by-step explanation:

just took the quiz

7 0
3 years ago
Simplify the expression. 8w + 5r – t + 9r
Wittaler [7]

Answer:

14r−t+8w

Step-by-step explanation:

Let's simplify step-by-step.

8w+5r−t+9r

=8w+5r+−t+9r

Combine Like Terms:

=8w+5r+−t+9r

=(5r+9r)+(−t)+(8w)

=14r+−t+8w

Answer:

=14r−t+8w

3 0
2 years ago
‼️PLEASE HELP ME‼️<br><br> The solution of the linear inequality 3x + 10 &lt; 6x + 9<br> is [ __,__)
jek_recluse [69]

Answer:

x= 1/3 its a fraction but i couldnt put the answer in fraction form.

Step-by-step explanation:

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=-5%2B78%2B%28-32%29" id="TexFormula1" title="-5+78+(-32)" alt="-5+78+(-32)" align="absmiddle"
AysviL [449]
Adding a negative is same as subtraction
-5+78-32
73-32
41
5 0
3 years ago
Read 2 more answers
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