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3 years ago

Help its for calculus

Mathematics

2 answers:

amm18123 years ago

8 0

Answer:

the first one

Step-by-step explanation:

kirill [66]3 years ago

7 0

Answer:

its 1/sqrt{5}+2

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2a+6=12 what does a equal a=? Please help.

Rashid [163]

Answer:

Step-by-step explanation:

2a+6=12

Step 1: Subtract 6 from both sides.

2a+6=12

-6 -6

2a=6

Step 2: Divide both sides by 2.

2a/2=6/2

a=3

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4 years ago

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In a triangle, the measure of the second angle is twice the measure of the first angle. The third angle is equal to the sum of t

bija089 [108]

X, 2x, and (x+2x)=3x

6x=180

x=30

30, 60, 90 triangle.

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4 years ago

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Based on the information from Harper's Index, 37 out of 100 adult Americans who did not attend college believe in extraterrestri

vazorg [7]

Answer: Yes, this indicate the proportion of adult americans that attended college and believe in extraterrestrials is higher than the proportion that did not attend college.

Step-by-step explanation:

Since we have given that

Hypothesis:

$H_0:p_1=p_2\\\\H_a:p_1>p_2$

n₁ = 100

x₁ = 37

So, $p_1=\dfrac{x_1}{n_1}=\dfrac{37}{100}=0.37$

n₂ = 100

x₂ =47

So, $p_2=\dfrac{47}{100}=0.47$

At 0.01 level of significance, z = 2.33

So, test statistic value would be

$z=\dfrac{p_1-p_2}{\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}}\\\\z=\dfrac{0.37-0.47}{\sqrt{\dfrac{0.37\times 0.63}{100}+\dfrac{0.47\times 0.53}{100}}}\\\\z=-1.44$

Since, 2.33>-1.44

Hence, we will reject the null hypothesis.

Therefore, Yes, this indicate the proportion of adult americans that attended college and believe in extraterrestrials is higher than the proportion that did not attend college

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3 years ago

Calc AB multiple choice. Please help

Vinvika [58]

You start off with 4*(cos(x+(pi/3)))

Let's place the 4 aside for the time being:

Cos(u+j) = cos(u)*cos(j) - sin(u)*sin(j)

cos(x+(pi/3)) = cos(x)*cos(pi/3) - sin(x)*sin(pi/3)

cos(x+(pi/3)) = cos(x)/2 - (sqrt(3)/2)*sin(x)

Multiplying by the 4 we put aside:

4*cos(x+(pi/3)) = 2*cos(x) - 2*sqrt(3)*sin(x)

The correct answer is B

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3 years ago

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Which i bigger between 7.05 or just 7?

lapo4ka [179]

Is 7 dollars and 5 cents more then just 7.00 dollars? correct answer is 7.05

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3 years ago