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2 years ago

Which facts could be applied to simplify this expression?Ckeck all that apply 5x+3y+(-x)+6z

Mathematics

2 answers:

Rufina [12.5K]2 years ago

8 0

Answer:

A, C, and D

Step-by-step explanation:

I just took the test.

kenny6666 [7]2 years ago

4 0

Answer:

5x+3y+(-x)+6z

5x+(-x)+3y+6z

4x+3y+6z

The facts to apply is PEMDAS which is parenthesis,exponents, multiplication,division,addition and subtraction.

Then group like terms if there are any.

You finally get to a simplified answer if there are no like terms

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3 years ago

Given that cos(30°) = cos(45°)cos(15°) + sin(45°)sin(15°), it follows that cos(30°) =

mario62 [17]

Answer:

$cos(30\°) = cos(45\°-15\°)$

Step-by-step explanation:

To solve this problem you must know the formula of subtraction of angles for the function cosx.

The formula is:

$cos(h-d) = cos(h)cos(d) + sin(h)sin(d)$

We can write 30° as: 45° - 15°

Then:

$cos(30\°) = cos(45\°-15\°)$

Using the formula for subtraction of angles we have:

$cos(45\°-15\°) = cos(45\°)cos(15\°) + sin(45\°)sin(15\°)$

Notice that we have achieved the expression shown in the statement

Finally:

$cos(30\°) = cos(45\°-15\°)$

8 0

2 years ago

Read 2 more answers

Which out of the options is correct? Merci!

AysviL [449]

Answer:

Step-by-step explanation:

The answer is C because 1 * 2 = 2, 2 * 2 = 4, and 4 * 2 = 8.

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3 years ago