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3 years ago

Which answer choice correctly solves for a and b?

Mathematics

1 answer:

Zepler [3.9K]3 years ago

6 0

Answer:

Step-by-step explanation:

Using the sine ratio and the exact value sin45° = $\frac{1}{\sqrt{2} }$ , then

sin45° = $\frac{opposite}{hypotenuse}$ = $\frac{6}{a}$ = $\frac{1}{\sqrt{2} }$ ( cross- multiply )

a = 6 $\sqrt{2}$

Using the tangent ratio and the exact value tan45° = 1 , then

tan45° = $\frac{opposite}{adjacent}$ = $\frac{6}{b}$ = 1 , so

b = 6

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Aleksandr [31]

Answer:

a= $\frac{3}{x^{2} }$

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Step-by-step explanation:

we are given

$\frac{3}{x} }$ + $\frac{5}{x^{2} }$ =ax+ $\frac{b}{x^{2} }$

we will compare both sides of equaion

$\frac{b}{x^{2} }$ = $\frac{5}{x^{2} }$

comparing both sides we get

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and

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a= $\frac{3}{x^{2} }$

hence

a= $\frac{3}{x^{2} }$

and b=5

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3 years ago

X is a normally Distributed random variable with a standard deviation of 4.00. Find the mean of X when 64.8% of the area lies to

Cerrena [4.2K]

Answer:

Step-by-step explanation:

σ = 4 ; μ =?

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Using the Z relation :

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3 years ago

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elena-s [515]

Answer:

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Step-by-step explanation:

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