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3 years ago

What is the sum of 821 and 153?

Mathematics

1 answer:

Snezhnost [94]3 years ago

3 0

The sum of this is 974

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Scilla [17]

The answer is D. First add 2k, then divide by a, the subtract x, then divide by -1

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4 years ago

This scale balanced when 1111plus+tequals=2424. suppose the left side becomes 1919plus+t.how can you change the right side so th

Charra [1.4K]

8 has been added to 11 to make it 19. 8 must be added to 24 to make it 32.

11 +t = 24
11 +8 +t = 24 +8
19 +t = 32

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3 years ago

Arrange the steps in the correct order to express cos3x in terms of cosx cos(2x)cos(x)-sin(2x)(x) [1-sin^2(x)]cos(x)-[2sin(x)cos

noname [10]

cos(3x) = cos(2x+x)

= cos(2x) cos (x) -sin(2x)sin(x)

$=(1-2sin^2(x)) cos(x)-(2 sin(x) cos(x)) sin(x)$

$= cos x -2sin^2(x) cos(x) -2sin^2(x) cos(x)$

$= cos(x) - 4 sin^2(x) cos(x)$

$cos(x)(1-4sin^2(x))$

$=cos(x(1-4(1-cos^2(x))$

$=cos(x)(1-4+4cos^2(x))$

$= cos(x)-4cos(x)+4cos^3(x)$

$=-3cos(x)+4cos^3(x)$

4 0

4 years ago

9(x+3)=7x-2x+4 solve forx

Paladinen [302]

9x+12=5x+4
9x-5x=12-4
4x=8
x=8/4
x=2

3 0

3 years ago

Read 2 more answers

When you substitute a value for x or y, you are x or y with a value.

Hitman42 [59]

Step-by-step explanation:

See whenever we have two variables like x and y.

And also we have given two equations in terms of x and y.

Example: ax + by = p and cx + dy = q

In order to get the solution, we need to find the value of x and y using the given two equations.

So here what we can do is:

Consider any one equation and get x or y from that equation.

i.e consider ax + by = p or x = $\frac{1}{a}*(p-by)$

Now plug value of x (or y) from the equation you have considered into the another equation.

i.e c( $\frac{1}{a}*(p-by)$ )+dy = q

Now solve this equation to get y (or x).

and after that we can find the other variable.

4 0

3 years ago

Read 2 more answers