All categories

3 years ago

Seventh Grade Students

Mathematics

1 answer:

Vlad1618 [11]3 years ago

8 0

Answer:

Step-by-step explanation:

FORMULA= P(A)=

NUMBER OF FAVORABLE OUTCOMES

-------------------------------------------------------------

NUMBER OF POSSIBLE OUTCOMES

GIVEN: 12 Guitars, 10 Bass, 9 Drums, 12 Keyboards

WANT: The probality a seventh grader chosen at randome will play drums

add all the instruments

12+10+9+12=33

there are 9 drums

FOLLOW THE FORMULA

9 3

---- = ---- SIMPLIFIES FORM

33 11

You might be interested in

ANSWER ASAP!

liraira [26]

The answer is y=-1/3x

8 0

4 years ago

Is it true that the integral LaTeX: \int x^2e^{2x}dx ∫ x 2 e 2 x d x can be evaluated using integration by parts? If so, state t

Marysya12 [62]

Answer:

Yes the integral can be evaluated by integration by parts as solved below.

Step-by-step explanation:

$\int x^{2}e^{2x}dx$

Taking algebraic function as first function and exponential function as second function we have

$\int x^{2}e^{2x}dx=x^{2}\int e^{2x}dx-\int (x^{2})'\int e^{2x}dx\\\\=x^{2}\frac{e^{2x}}{2}-\int 2x\times \frac{e^{2x}}{2}dx\\\\\frac{x^{2}e^{2x}}{2}-\int xe^{2x}dx\\\\Now\\\\\int xe^{2x}dx=x\int e^{2x}dx-\int 1\cdot \int e^{2x}dx\\\\=\frac{xe^{2x}}{2}-\int \frac{e^{2x}}{2}dx\\\\\frac{xe^{2x}}{2}-\frac{e^{2x}}{4}\\\\\therefore \int x^{2}e^{2x}dx=\frac{x^{2}e^{2x}}{2}-\frac{xe^{2x}}{2}+\frac{e^{2x}}{4}$

5 0

3 years ago

Find the missing number.<br> 48/6 = ?/24

schepotkina [342]

Answer: 192

Step-by-step explanation:

48/6= 8 and 192/24= 8

4 0

3 years ago

Find the average velocity of the function over the given interval 2+tan x[-pi/4

Andreyy89

2+tan ×[-pi/4

2×10=20×16=[pi/320

7 0

4 years ago

A vehicle with a mass of 500 kg rolls down a slanted road with an acceleration of 0.04 m / s2. The frictional force

lilavasa [31]

Answer:

a) Sketch in annex

b) angle is 22 °

c) grade of the hill is tan 22° = 0,40

Step-by-step explanation: See Annex for free body diagram

According to Newton´s second law

∑ Fy = 0 ⇒ mg cos ∠CAB - Fn = 0

Notice ∠ CAB = ∠ POD ( They have perpendicular sides )

mg = 500 Kg * 9.8 m/sec² ⇒ mg = 4900 [N]

mg cos ∠CAB - Fn = 0 ⇒ 4900*cos ∠CAB = Fn (1)

∑ Fx = ma

mg* sin ∠CAB - Fr = 500* 0.04 m/sec² = 20 [N]

4900 * sin ∠CAB = 1800 + 20 [N]

sin ∠CAB = 1820 / 4900 ⇒ sin ∠CAB = 0.3714

From tables we get

∠CAB = 22°

6 0

4 years ago