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4 years ago

!!!!20 POINTS PLZ HELP!!!

Mathematics

1 answer:

faust18 [17]4 years ago

3 0

C de mmmmmmggffthxjdue

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Which number is irrational? A.0.3 B. C.0.777... D.0.454545…

Savatey [412]

Each of A, C, and D are rational, so presumably B is the answer here.

A is rational, since $10\times0.3=3$ , so $0.3=\dfrac3{10}$ .

C is also rational. If $x=0.777\ldots$ , then $10x=7.777\ldots$ . This would mean $10x-x=9x=7$ , and so $x=\dfrac79$ .

D is rational by a similar argument. If $x=0.4545\ldots$ , then $100x=45.4545\ldots$ . So, $100x-x=99x=45$ , which means $x=\dfrac{45}{99}=\dfrac5{11}$ .

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3 years ago

1/3 *divide* 3/8 = m help?

MariettaO [177]

Answer:

8/9

Step-by-step explanation:

To make it a fraction form answer, you multiply the dividend numerator by the divisor denominator to make a new numerator.

Furthermore, you multiply the dividend denominator by the divisor numerator to make a new denominator:

Thus, the answer to 1/3 divided by 3/8 in fraction form is: 8/9

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3 years ago

Read 2 more answers

If tan of theta =3/4 what is sec of theta

zhannawk [14.2K]

Answer:

5/4

Step-by-step explanation:

Given :

tanθ = 3/4 = opposite/adjacent

Finding the missing side :

The hypotenuse must be found
√3² + 4²
√25
5

Taking the sec ratio :

secθ = hypotenuse/opposite
secθ = 5/4

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2 years ago

What is the value of f(x)=1/2x+5 when x=4?

Soloha48 [4]

Answer:

f=7/4

Step-by-step explanation:

substitute x for 4 and do the equation you will get the equation f(4)=1/2(4)+5 simplify to the equation to 4f=2+5. Then do the addition and get 4f=7. Divide both sides by 4 and get f=7/4

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3 years ago

Lindsay invested $4500 at 4% interest compounded annually.

goldfiish [28.3K]

Answer:

$\$2,161.1$