2 years ago

(3x-4) (x+2) = 448 What is the value of x?

Mathematics

1 answer:

saul85 [17]2 years ago

8 0

Step-by-step explanation:

3x²+6x-4x-8=448

3x²+2x=456

3x²+2x-456=0

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2 years ago

Which symbol correctly compares these fractions? −4/5 −8/9

mrs_skeptik [129]

Answer:

" > "

Step-by-step explanation:

-4/5=4x9 5×9

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7 months ago

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vovangra [49]

Answer:

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2 years ago

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2 years ago

In how many ways can 3person study groups beselected from a class of 25students?Note: nrn!r!(n-r)!nEnter

nlexa [21]

Answer:

2,300

Explanation:

This is given as:

$\begin{gathered} 25\text{ combination 3 represented as:} \\ ^nC_r=\frac{n!}{r!(n-r)!} \\ n=25 \\ r=3 \\ ^{25}C_3=\frac{25!}{3!(25-3)!} \\ ^{25}C_3=\frac{25\times24\times23\times22!}{3!\times22!} \\ ^{25}C_3=\frac{25\times24\times23}{3\times2\times1} \\ ^{25}C_3=2300 \end{gathered}$

Therefore, there are 2,300 ways that 3 persons can be selected from 25 people

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5 months ago