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2 years ago

I need help with this asap! i will give brainliest :) (image included)

Mathematics

2 answers:

trasher [3.6K]2 years ago

5 0

7 x 3 = 21 so it is 21 ft cm your welcome

BabaBlast [244]2 years ago

5 0

Answer:

The answer is C = 63π

Step-by-step explanation:

V = πr2 h

V = π (3)2 x 7

V = π (9) (7)

V = 63 π

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Solve the equation : <img src="https://tex.z-dn.net/?f=%20%5Ccos%28x%29%20-%20%20%5Csin%28x%29%20%20%3D%20%20%5Csqrt%7B2%20%

Debora [2.8K]

Answer:

General solution is

$x = n \pi + \frac{\pi }{8}$

Step-by-step explanation:

Step(i):-

Given cos x - sin x = √2 cos (3 x)

Dividing '√2' on both sides , we get

$\frac{1}{\sqrt{2} } cos (x) - \frac{1}{\sqrt{2} } sin (x) = \frac{\sqrt{2} cos (3 x)}{\sqrt{2} }$

we will use trigonometry formulas

a) Cos ( A + B) = Cos A Cos B - sin A sin B

b) $cos \frac{\pi }{4} = \frac{1}{\sqrt{2} }$

Step(ii):-

$\frac{1}{\sqrt{2} } cos (x) - \frac{1}{\sqrt{2} } sin (x) = \frac{\sqrt{2} cos (3 x)}{\sqrt{2} }$

$cos (\frac{\pi }{4} ) cos x - sin(\frac{\pi }{4} ) sin x = cos 3x$

$cos (\frac{\pi }{4}+x ) = cos 3 x$

Step(iii):-

General solution of cos x = cos ∝ is x = 2 nπ+∝

we have $cos (\frac{\pi }{4}+x ) = cos 3 x$

The general solution of $cos (\frac{\pi }{4}+x ) = cos 3 x$ is

⇒ $3 x = 2 n \pi + (\frac{\pi }{4}+x )$

⇒ $3 x- x = 2 n \pi + \frac{\pi }{4}$

$2x = 2 n \pi + \frac{\pi }{4}$

final answer:-

General solution is

$x = n \pi + \frac{\pi }{8}$

8 0

3 years ago

Find the difference. 7 1/2 - 6 3/10 i don't need the steps ^-^

Elodia [21]

well 7-6 is one then you'll find common demonstrators with the fractions then simplify them then subtract them to get 1 1/4

8 0

3 years ago

What is the slope of the line? please help right answers only please!

grigory [225]

Answer: 2

Step-by-step explanation:

$Slope = \frac{y_{2} -y_{1} }{x_{2}-x_{1} } \\Slope = \frac{3 - 1}{1} = 2$

8 0

2 years ago

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Cindy plants a daffodil plant. If the plant has one daffodil flower to start with, and the number of daffodils triples every wee

Romashka [77]

Answer:

There will be 729 daffodils in the sixth week

Step-by-step explanation:

Given

$a = 1$ --- start

$r = 3$ --- weekly rate

Required

Number of daffodils in 6th week

This question illustrates an exponential function which is represented as

$f(x) = ab^x$

Where

f(x) = Number of daffodils at x week

x = The week

a = Initial number of daffodils

b= rate

So, we have:

$a = 1$

$b = r = 3$

Hence:

$f(x) = 1 * 3^x$

$f(x) = 3^x$

At the 6th week

$x = 6$

So:

$f(6) = 3^6$ ---- as a power

$f(6) = 3 * 3 * 3 * 3 * 3 * 3$ --- related multiplication

$f(6) = 729$ --- standard form

4 0

3 years ago

The box-and-whisker plots below represent the scores for two basketball teams throughout an entire season of games. Which of the

omeli [17]

Answer:

Step-by-step explanation:

*One half of two fifths of x.

7 0

3 years ago

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