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3 years ago

What is 30x + 40 factored

Mathematics

1 answer:

amm18123 years ago

8 0

Answer:

1 0 ( 3 + 4 )

Step-by-step explanation:

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Carey has 30 CDs and wants to take pick out 5 to put into her CD player. How many different combinations of CDs can she pick out

Solnce55 [7]

The correct answer is C(30,5)

That's because you have to know factorials and apply the formulas to find out that:
30! / [5!(30 - 5!)]
30! / (5! * 25!), which means that there are 142506 combinations, or C(30,5)

3 0

3 years ago

Read 2 more answers

X + 7y = 21 x + 4y = 15 Solve the simultaneous equations

Mariulka [41]

Answer:

x = 7, y = 2

Explanation:

equations given:

x + 7y = 21

x + 4y = 15

make "x" the subject:

x + 7y = 21

x = 21 - 7y .........equation 1

x + 4y = 15

x = 15 - 4y .......equation 2

Solving both the equations simultaneously:

15 - 4y = 21 - 7y

-4y + 7y = 21 - 15

3y = 6

y = 6 ÷ 3

y = 2

If y is 2

Then x = 21 -7y;

x = 21 - 7(2)

x = 21 - 14

x = 7

8 0

2 years ago

Read 2 more answers

What is are the numbers to P.I.E

Finger [1]

Answer:

Step-by-step explanation:

4 0

3 years ago

Here are the first five terms of a sequence.

Snezhnost [94]

Step-by-step explanation:

3 to 8= 5

8 to 17= 9

17 to 30= 13

30 to 47= 17

47 to 68= 21

68 to 93= 25

93 to 122= 29

122 to 155= 33

155 to 192= 37

difference is 4

solve by

$2 {n}^{2} - n + 2 \\ 2 {(9)}^{2} - 9 + 2 \\ 2(81) - 9 + 2 \\ 162 - 9 + 2 \\ 153 + 2 = 155$

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3 years ago

Wing

lesantik [10]

I honestly don’t understand

7 0

3 years ago