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3 years ago

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Simona's music book includes 50 piano tunes, of which 7 are by Bach, and 18 are by Mozart. If Simona chooses a tune at random, w

hat is the probability that it is either by Bach or by Mozart?

1 answer:

photoshop1234 [79]3 years ago

4 0

1/2, because there are 25 tunes by Bach or Mozart, and 25/50 simplifies to 1/2

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F f(x) = 2x2 + 1 and g(x) = x2 – 7, find (f + g)(x).

shutvik [7]

2x2 + 1 + <span> x2 – 7
= 3x2 - 6

answer is </span><span>C. 3x2 – 6</span>

4 0

4 years ago

Evaluate the integral using integration by parts with the indicated choices of u and dv. (Use C for the constant of integration.

Aleksandr-060686 [28]

Take

$u=\ln x\implies\mathrm du=\dfrac{\mathrm dx}x$

$\mathrm dv=4x^2\,\mathrm dx\implies v=\dfrac43x^3$

Then

$\displaystyle\int4x^2\ln x\,\mathrm dx=\frac43x^3\ln x-\frac43\int x^2\,\mathrm dx=\frac43x^3\ln x-\frac49x^3+C$

$=\boxed{\dfrac49x^3(3\ln x-1)+C}$

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4 years ago

X - 3= -21 <br>This is so confusing:(

Aneli [31]

Answer:

$\huge\boxed{x=-18}$

Step-by-step explanation:

In order to solve this, we are trying to find the value of $x$ . Basically, $x$ is a placeholder for a number that is unknown. Some number minus 3 is equal to 21.

Our goal is to find $x$ . To do this we want to isolate $x$ on one side of the equation

$x-3=-21$

Let's add 3 to both sides.

$x-3 + 3 = -21+3\\\\-3 + 3 = 0\\\\x = -21+3\\\\x=-18$

Hope this helped!

6 0

3 years ago

Read 2 more answers

What is the distance between the points (2,-3) and (-6,4) on the coordinate plane

fomenos

Cmon man this is easy‍♂️

6 0

4 years ago

Read 2 more answers

A rectangular vegetable patch is 93 feet long and 37 feet wide. What is its area?

stealth61 [152]

Answer:

A= 3441

P = 260

Step-by-step explanation:

Area = l x w

93 x 37 = =3441

Perimeter = 2l + 2w

2(93) + 2(37) = 260

5 0

4 years ago