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pogonyaev
3 years ago
12

Help pls and explain !!

Mathematics
2 answers:
Alborosie3 years ago
8 0
Help pls and explain !!

if c/d - a/b =x, a =2c, and b=5d, what is the value of c/d in terms of x?

D) 5/3 X
Aneli [31]3 years ago
6 0

Answer:

d) 5/3 x

Step-by-step explanation:

You substitute a for 2c and b for 5d, so your equation will look like this:

c/d - 2c/5d = x

Then you just simplify into x by making c/d into 5c/5d so you have a common denominator.

5c/5d - 2c/5d = x

3c/5d = x

5/3 is your answer

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How many different 5-person subcommittees can be formed from a club having 12 members
Wittaler [7]
Given that there are 12 persons, the first choice may be in 12 different ways, the second choice may be in 11 different ways, ther third in 10 different ways, the fourth in 9 different ways and the fith in 8 different ways, for a total of:

12x11x10x9x8 different combinations.

Now you have to take in account that 5x4x3x2 are repetitions. So you have to divide the previos counting by 5x4x3x2.

(12x11x10x9x8)/(5x4x3x2) = 792 different subcommittees.

Also, you can use the formula for combinations: C(m,n) = m! / (n! (m-n)!)

C (12, 5) = 12! / (5!) (12-5)! = [12x11x10x9x8x7!] / [5! 7!] = [12x11x10x9x8]/[5x4x3x2] = 792
3 0
3 years ago
How do you factor x^4-36?
Anettt [7]
X4 over nothing-36 hope this willl work
6 0
3 years ago
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Please help i need answer for test
Korvikt [17]

Answer:

He did the complete opposite of what he needed to do

Step-by-step explanation:

The error is that when you need to find x - intercept, you need to replace the value of y with zero, not the y value.

Cause otherwise, what he did here is to find the y - intercept

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below :)

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3 years ago
Write an equivalent expression for 4g+2 using the distributive property.
snow_lady [41]
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3 years ago
HELP NEEDED!<br><br> Evaluate: 8 + -12 - -12/2
svp [43]

Answer:

2

Step-by-step explanation:

because if 8+-12= about-4 so if you have a negative number plus a positive it equals a negative number then you have -4 minus -12 equals a positive is 8 because if its negative and negative it equals a positive number then you have 8/2 and it equals 4 because that slash is a divided sign all together it is 8+-12-(-12)/2=2

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3 years ago
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