Answer the question who ever does the best gets brain award (whatever its called)

Mathematics

2 answers:

Tomtit [17]3 years ago

6 0

Answer: The answer is B (or the second one)

Tasya [4]3 years ago

5 0

Answer:

The second one

Step-by-step explanation:

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Mathema

murzikaleks [220]

9514 1404 393

Answer:

(3) 12

Step-by-step explanation:

Let x represent the length of leg XY. Then the length of YZ is x/2 and the area of the right triangle is ...

A = 1/2bh

A = 1/2(x)(x/2) = x²/4

36 = x²/4 . . . . . use the given value for area

144 = x² . . . . . . multiply by 4

√144 = 12 = x . . . . . take the square root

The length of leg XY is 12 cm.

8 0

2 years ago

Evaluate the Riemann sum for (x) = x3 − 6x, for 0 ≤ x ≤ 3 with six subintervals, taking the sample points, xi, to be the right e

DENIUS [597]

Hello,

Reminders:
$$\sum_{i=1}^{n} i= \dfrac{n(n+1)}{2}$


$
$$ \sum_{i=1}^{n} i^2= \dfrac{n(n+1)}{2}$

$
$$ \sum_{i=1}^{n} i^3= \dfrac{n^2(n+1)^2}{4} $
$

$n=6\\
x_{0}=0\\
x_{n}=3\\
\Delta= \dfrac{x_n-x_0}{n}=0.5\\

$
$x_{i} =0+\Delta*i= \frac{i}{2}$

$\sum_{i=1}^{n}\ \Delta*f(x_{i})=\sum_{i=1}^{6}\ \dfrac{i^3/8-6i}{2}$
$$= \dfrac{1}{2}\sum_{i=1}^{6} (\frac{i^3}{8} -6i)=\dfrac{1}{16}*\frac{(6*7)^2}{4}- \frac{9*7}{2}= -3.9575$

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