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2 years ago

Evaluate C(5, 2). 10 20 30

Mathematics

1 answer:

JulsSmile [24]2 years ago

8 0

Answer:

Step-by-step explanation:

$C(5,2)=\frac{5*4}{2*1} =10$

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One number is one-fifth of another number. The two numbers total 18. Find the numbers

Masja [62]

Answer:

One number is 17 and the other is 85.

Step-by-step explanation:

Let the numbers be m and n. Let m = (1/5)n. Note that m+n = 18.

Substituting (1/5)n for m in the 2nd equation, we get (1/5)n + (5/5)n = 18. Multiplying all three terms by 5 to remove fractions, we get n + 5 = 90, so that n = 85. m is (1/5) of 85, or m = 17.

8 0

2 years ago

12 is 90% of what number?<br><br><br> with steps

a_sh-v [17]

Answer:

<h3><u>Let's</u><u> </u><u>understand the concept</u><u>:</u><u>-</u></h3>

Here 12 is 90% of a number.
So we can say that 90% of That number is 12 .
In this way we can get the the number

<h3><u>Solution</u><u>:</u><u>-</u></h3>

Let,

the number=x

<h3>According to the question ,</h3>

${:}\longrightarrow$ $\sf 90\% \:of \;x=12$

We know 90%=90/100
so add it

${:}\longrightarrow$ $\sf {\dfrac {90}{100}}\times x=12$

${:}\longrightarrow$ $\sf {\dfrac {90x}{100}}=12$

Now use cross multiplication method

${:}\longrightarrow$ $\sf 90x=12\times 100$

${:}\longrightarrow$ $\sf 90x=1200$

Now interchange sides .

${:}\longrightarrow$ $\sf x={\dfrac {1200}{90}}$

${:}\longrightarrow$ $\sf x={\dfrac {200}{15}}$

Answer will come in decimals so we take approximate value.

${:}\longrightarrow$ $\sf x=13.3$

${:}\longrightarrow$ $\sf x=approximately \:13$

$\therefore$ The number is 13.

6 0

2 years ago

Find the zeros of the function.<br><br> f(x) = 9x2 + 6x - 8

jeyben [28]

Just set it equal to zero and solve using the quadratic equation.

7 0

2 years ago

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Where dose this number go on the number line?

dusya [7]

It would go after four as it equates to about 4.2

6 0

2 years ago

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(4x+2)=102+44 solve for x

sergiy2304 [10]

<h3>Solution:</h3>

(4x + 2) = 102 + 44
or, 4x = 102 + 44 - 2
or, 4x = 144
or, x = 144 ÷ 4
or, x = 36

<h3>Answer:</h3>

x = 36

8 0

2 years ago

Read 2 more answers