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ser-zykov [4K]
3 years ago
7

Its says find a common denominator for each pair of fractions and then rename each fraction. Please answer it.

Mathematics
2 answers:
Serhud [2]3 years ago
5 0
24/40 15/40. (common denominator is 5x8)
alexgriva [62]3 years ago
5 0
4: D=40. 24/40 and 15/40
5: D=21. 6/21 and 10/21
6: Sorry I cannot help with this one :(
7: And I cannot see this one well enough to answer it.
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Prime factors of 4,725 are 3, 5 and 7
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3 years ago
the function f is defined by f(x)=150/x-z where z is a constant. find z if the value of f at x=1/5 is equal to 250
malfutka [58]

Answer:

x = -1 \frac{1}{20}

Step-by-step explanation:

f(\frac{1}{5}) = 120, therefore we can create this equation:

120 = 150 ÷ (\frac{1}{5} - z)

cross-multiply to get: 24 - 120z = 150

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z = -1 \frac{3}{60}

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3 years ago
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3 years ago
Show that x³ + y³ + z³ - 3xyz is a multiple of x+y+z
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x³ + y³ + z³ - 3xyz is a multiple of x+y+z.

<h3>What is a multiple?</h3>

It should be noted that a multiple simply means a number that van be divided by another a certain number if times without a remainder.

Put x + y + z = 0

= x³ + y³ + z³ - 3xyx

= 0(x² + y² + z² - xt - yz - zx)

= x³ + y³ + z³ - 3xyz = 0.

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Learn more about multiples on:

brainly.com/question/251701

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7 0
2 years ago
In order to estimate the mean amount of time computer users spend on the internet each​ month, how many computer users must be s
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Answer:

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Step-by-step explanation:

We have that for 95% of confident, the value of z has a value of 1.96 (attached table about it), they also mention the margin of error (E) that is 10 and finally the standard deviation (sd) that has a value of 221.

We apply the following formula:

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replacing:

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that is, the minimum sample size is 1877

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