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3 years ago

Determine whether y=4(7)^x represents an exponential function.

Mathematics

1 answer:

gtnhenbr [62]3 years ago

8 0

B
Because the its follows the pattern also b isn’t negative

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Find the cube root of 13824 by prime factorization method

V125BC [204]

Answer:

On factorizing 13824, we get

13824=2^9 ×3 ^3

So, cube root =2^3×3

Step-by-step explanation:

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3 years ago

In an arithmetic-sudoku, the values 1,2,3,4 appear exactly once in each row and each column. Which value belongs in the grey squ

Romashka [77]

Answer:

Value 5

Step-by-step explanation:

The number of rows and columns of the Sudoku is not stated; so, I will assume it is 5 by 5, since there is only one gray square left to be occupied.

If 1 - 4 appears in each row and 1 - 4 appears in each column (take for instance, the attached Sudoku image), then the value that should be entered in the gray square is 5.

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3 years ago

Katie leans a 12-inch ruler against a stack of books that is 7 inches high. The ruler leans in such a way that the tip of the ru

Vinvika [58]

B. 35.69

mark as brainiest please and thank you.

3 0

3 years ago

Read 2 more answers

Five plus one multiplied by ten eaquals 5 1x10=

faust18 [17]

By order of operation
5+1x10
5+10
15

By normal solving
5+1x10
6x10
60

3 0

3 years ago

Show that cos(3x) = cos3(x) − 3 sin2(x)cos(x). (Hint: Use cos(2x) = cos2(x) − sin2(x) and the cosine sum

otez555 [7]

<u>Step-by-step explanation:</u>

To prove:

$\cos 3x=\cos^3x-3\sin^2 x\cos x$

Identities used:

$\cos(A+B)=\cos A\cos B+\sin A\sin B$ ......(1)

$\sin 2A=2\sin A\cos A$ ........(2)

$\cos 2A=\cos^2A-\sin^2 A$ .......(3)

Taking the LHS:

$\Rightarrow \cos 3x=\cos (x+2x)$

Using identity 1:

$\Rightarrow \cos (x+2x)=\cos x\cos 2x-\sin x\sin 2x$

Using identities 2 and 3:

$\Rightarrow \cos x(\cos ^2x-\sin^2 x)-\sin x(2\sin x\cos x)\\\\\Rightarrow \cos^3x-\sin^2x\cos x-2\sin^2 x\cos x\\\\\Rightarrow \cos^3x-3\sin^2x\cos x$

As, LHS = RHS

Hence proved

4 0

3 years ago