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3 years ago

First try was incorrect

Mathematics

1 answer:

KiRa [710]3 years ago

5 0

Answer:

12 presents

Step-by-step explanation:

4/6= 2/3

2/3 x 18 = 12

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What kind of context clue provides the meaning of a word directly in the sentence?

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Answer:

The answer is definition.

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3 years ago

When representing a frequency distribution with a bar chart, which of these

gogolik [260]

The answer would be C

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3 years ago

Mark is purchasing new tiles for his bathrooms. The home improvement store charges $48 for each box of tiles when three or fewer

shutvik [7]

Answer:

f(x)=

1. 48x when x < or = 3,

2. 45x when 4 < or = x < or = 8

3. 42x when 9 < or = x < or = 19

4. 38x when x > 19

Step-by-step explanation:

3 boxes or less = Cost of tiles = $48

4 - 8 boxes ; cost = $45

9 - 19 boxes ; cost = $42

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2 years ago

(cot^2x - 1)/(csc^2x) = cos2x

Alex787 [66]

Answer:

Step-by-step explanation:

The idea here is to get the left side simplified down so it is the same as the right side. Consequently, there are 3 identities for cos(2x):

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

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

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

We begin by rewriting the left side in terms of sin and cos, since all the identities deal with sines and cosines and no cotangents or cosecants. Rewriting gives you:

$\frac{\frac{cos^2x}{sin^2x} -\frac{sin^2x}{sin^2x} }{\frac{1}{sin^2x} }$

Notice I also wrote the 1 in terms of sin^2(x).

Now we will put the numerator of the bigger fraction over the common denominator:

$\frac{\frac{cos^2x-sin^2x}{sin^2x} }{\frac{1}{sin^2x} }$

The rule is bring up the lower fraction and flip it to multiply, so that will give us:

$\frac{cos^2x-sin^2x}{sin^2x} *\frac{sin^2x}{1}$

And canceling out the sin^2 x leaves us with just

$cos^2x-sin^2x$ which is one of our identities.

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3 years ago

*PLEASE ANSWER, DIFFICULT QUESTION*

Serjik [45]

Answer:

d.) simplify the expression inside the pipe symbols

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3 years ago