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3 years ago

If I make a 40.2% on a test what fraction of the questions did I answer correctly

Mathematics

2 answers:

Alisiya [41]3 years ago

5 0

Depends on the number of questions. How many questions were there?

Less than half, btw.

Sav [38]3 years ago

3 0

How many questions were there? You got less than half of the questions correct.

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What is the decimal to this fraction

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3 years ago

Find the balance on a deposit of $1200 at 10% compounded annually for 5 years.

Sav [38]

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I believe the answer is d, but im not quite sure

Step-by-step explanation:

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3 years ago

Please help! i have no clue if it's equivalent :(

tensa zangetsu [6.8K]

Answer:

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

y+2=y+2

Step 2: Subtract y from both sides.

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2=2

Step 3: Subtract 2 from both sides.

2−2=2−2

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3 years ago

Read 2 more answers

What is the sine ratio for

MaRussiya [10]

The sine ratio is the ratio of the length of the opposite side devised by length of the hypotenuse.

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3 years ago

Which is the following is the set of real zeros of the function f(x) = (x3 + 1000)(x4 - 160,000)?

marusya05 [52]

Answer:

A. { -20, -10, 20 }

Step-by-step explanation:

Given:

The function is given as:

$f(x)=(x^3+1000)(x^4-160000)$

Let us simplify the function.

First, we use the identity $a^3+b^3=(a+b)(a^2-ab+b^2)$

$x^2+1000= x^3+10^3=(x+10)(x^2-10x+10^2)\\x^3+1000=(x+10)(x^2-10x+100)$

Next, we use the identity $a^4-b^4=(a-b)(a+b)(a^2+b^2)$

$x^4-160000=x^4-20^4=(x-20)(x+20)(x^2+20^2)=(x-20)(x+20)(x^2+400)$

Now, the function can be rewritten as:

$f(x)=(x+10)(x^2-10x+100)(x-20)(x+20)(x^2+400)$

Now, the zeros are those values of $x$ for which $f(x)=0$

Now, for $f(x)=0$ , we must have either of the factors 0.

$x+10=0\\x=-10$

$x-20=0\\x=20\\\\x+20=0\\x=-20$

The factors $x^2-10x+100$ and $x^2+400$ can have no zeros as the first one has imaginary roots and second one is always greater than 0 irrespective of the $x$ values.

So, the possible set of zeros are { -20, 10, 20 }.

6 0

4 years ago