3 years ago

What number can factor -72

Mathematics

1 answer:

Lera25 [3.4K]3 years ago

7 0

Answer:

i dont really know what you mean but here is what i got:

1 and 72

2 and 36

3 and 24

4 and 18

6 and 12

8 and 9

add a negative sign to either one per pair!

example: -1 and 72 or 4 and -18

Step-by-step explanation:

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Which expression is equivalent to 25.85/1.5

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Answer:

51.7/3

Step-by-step explanation:

multiply it by 2

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Given the function f(x) = 5x^2 - x + 20, find f(3)<br> A) -20<br> B)-13<br> C) 62<br> D) 64

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Work Shown:

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Let be the set of permutations of whose first term is a prime. If we choose a permutation at random from , what is the probabili

Dennis_Churaev [7]

Answer:

$Pr = \frac{1}{6}$

Step-by-step explanation:

Given

$S = \{1,2,3,4,5\}$

$n = 5$

Required

Probability the third term is 3

First, we calculate the possible set.

The first must be prime (i.e. 2, 3 and 5) --- 3 numbers

$2nd \to 4\ numbers$

$3rd \to 3\ numbers$

$4th \to 2\ numbers$

$5th \to 1\ number$

So, the number of set is:

$S = 3 * 4 * 3 * 2 * 1$

$S = 72$

Next, the number of sets if the third term must be 2

$1st \to 2$ i.e. 1 or 5

$2nd \to 3\ numbers$ ---- i.e. remove the already selected first term and the 3rd the compulsory third term

$3rd \to 1\ number$ i.e. the digit 2

$4th \to 2\ numbers$

$5th \to 1\ number$

$r = 2 * 3 * 1 * 2 * 1$

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So, the probability is:

$Pr = \frac{r}{S}$

$Pr = \frac{12}{72}$

$Pr = \frac{1}{6}$

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