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3 years ago

5 2/5 ÷ 2 1/3 help me pls

Mathematics

2 answers:

DaniilM [7]3 years ago

8 0

Answer:

5 2/5 ÷ 2 1/3 = 81/35 or 2.31

Step-by-step explanation:

Let's simplify the problem:

5 2/5 = 25/5 + 2/5 = 27/5

2 1/3 = 6/3 + 1/3 = 7/3

To the calculation:

$\frac{27}{5}$ ÷ $\frac{7}{3}$ = $\frac{27}{5}$ × $\frac{3}{7}$ = $\frac{81}{35}$ = 2.31

mash [69]3 years ago

7 0

Answer

ok so you want to turn the mixed fractions to improper fractions so 5 2/5 would be 27/5 and 2 1/3 would be 7/3. Then you want to multiply by the reciprocal. 27/5 x 3/7 and then you get your answer 81/35 (but simplify it)

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3 years ago

Which of the values shown are potential roots of f(x) = 3x3 – 13x2 – 3x + 45? Select all that apply.

galina1969 [7]

Answer:

All potential roots are 3,3 and $-\frac{5}{3}$ .

Step-by-step explanation:

Potential roots of the polynomial is all possible roots of f(x).

$f(x)=3x^3-13x^2-3x+45$

Using rational root theorem test. We will find all the possible or potential roots of the polynomial.

p=All the positive/negative factors of 45

q=All the positive/negative factors of 3

$p=\pm 1,\pm 3,\pm 5\pm \pm 9,\pm 15\pm 45$

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$\frac{p}{q}=\pm 1,\pm 3,\pm 5\pm \pm 9,\pm 15\pm 45,\pm \frac{1}{3},\pm \frac{5}{3}$

Now we check each rational root and see which are possible roots for given function.

$f(1)= 3\times 1^3-13\times 1^2-3\times 1+45\Rightarrow 32\neq 0$

$f(-1)= 3\times (-1)^3-13\times (-1)^2-3\times (-1)+45\Rightarrow \neq 32$

$f(-3)= 3\times (-3)^3-13\times (-3)^2-3\times (-3)+45\Rightarrow \neq -144$

$f(3)= 3\times (3)^3-13\times (3)^2-3\times (3)+45\Rightarrow =0\\\\ \therefore x=3\text{ Potential roots of function}$

Similarly, we will check for all value of p/q and we get

$f(-5/3)=0$

Thus, All potential roots are 3,3 and $-\frac{5}{3}$ .

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3 years ago

Read 2 more answers

5 2/5 ÷ 2 1/3 help me pls​

5 2/5 ÷ 2 1/3 help me pls