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3241004551 [841]

2 years ago

6

Ken’s fish tank cost $35.30. The air pump cost $12.50. The rocks for the floor of the tank cost $3.99. Fish food cost $4.25 How

much money did Ken spend on these items?

1 answer:

Harlamova29_29 [7]2 years ago

7 0

Answer:$56.04

Step-by-step explanation: just add them all

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Linda bought a cube jewelry box. The volume of the jewelry box is 64 cubic inches. What is the edge length of Linda’s jewelry bo

yawa3891 [41]

Answer:

The edge length will be equal to 4 inches.

Step-by-step explanation:

The volume of a cube = s * s * s (in which s represent side of the cube)

V = s * s * s

V = s³

64 = s³

64 = 4³

So edge length of the cube will be 4 inches.

7 0

2 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

2 years ago

Which of the following expressions cannot be written as an integer?

dangina [55]

Answer:

1.2 x 102

Step-by-step explanation:

An integer is an whole number. It is not a fraction or a decimal.

Types of Integers

1. Positive integers e.g. 18, 3, 149

2. Negative integers e.g. -30

3. Zero integers e.g. 0

1.2 x 102 = 122.4. 122.4 is not an integer because it is not a whole number

3 0

2 years ago

Y=sin(1/2x) what would this look like on a 2pi graph

Andrew [12]

Just plot it and you get something like this ...

6 0

2 years ago

Miguel wants to have at least $500 in his account to spend over the summer. He already has $150. If he deposits $25 each week, w

Paul [167]

Answer:

listen to the other guy

or girl

Step-by-step explanation:

8 0

2 years ago