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mrs_skeptik [129]

2 years ago

9

Dilations are changes in size.true or false Plzzzzzzz help im doing a test

1 answer:

netineya [11]2 years ago

5 0

Answer:

false it changes the length but not size

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2 years ago

Select all of the following expressions that are equivalent to 16a+40 .

lina2011 [118]

The first one is true
<span>4(4a+10) is
</span>16 a + 40 after distribution

The second one is also true
<span>2(8a+20)
16a + 40 after distribution

Third is not true
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Last one is also true
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Hope this helps :)</span>

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2 years ago

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melomori [17]

Answer:

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2 years ago

If angle X is an acute angle with tan X = 8/7, what is the value of sec X?

iren [92.7K]

Answer: $\frac{\sqrt{113}}{7}$

Step-by-step explanation:

As X is an acute angle, all 6 trigonometric functions with an argument of X are positive.

Using the identity $1+\tan^{2} X=\sec^{2} X$ ,

$1+\left(\frac{8}{7} \right)^{2}=\sec^{2} X\\\\\sec^{2} X=\frac{113}{49}\\\\\therefore \sec X=\boxed{\frac{\sqrt{113}}{7}}$

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11 months ago