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4 years ago

What is the measurement of angle X

Mathematics

2 answers:

nataly862011 [7]4 years ago

8 0

Answer:

i believe the answer is 45° :)

muminat4 years ago

4 0

Answer:

x=45°

Step-by-step explanation

let E be the vertex of 80° and 55° meeting point

in triangle BCE

∠55°+∠C+∠B=180°

∠55°+∠C+90°=180°

∠C=180°-90°-55°=35°

IN triangle EDC

∠E+∠D+∠C=180°

given ∠E=80° ∠C=55° ∠D=X

80°+X+55°=180°

X=180°-80°-55°

X=45°

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Assume a significance level of alpha = 0.05 and use the given information to complete parts (a) and (b) below. Original claim

laiz [17]

Answer:

The correct option is B

The correct option is D

Step-by-step explanation:

From the question we are told that

The level of significance is $\alpha = 0.05$

The p-value is $p = 0.2761$

Considering question b

Given that the $p< \alpha$ then the null hypothesis is rejected

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Given that the original claim is The standard deviation of pulse rates of a certain group of adult males is more than 11 bpm

Then the null hypothesis is $H_o : \sigma = 11$

The reason why the null hypothesis is write like this above is because a null hypothesis expression can not contain only a > or a < but only allows = $\le , \ and \ \ge$

and the alternative hypothesis is $H_a : \sigma > 11$

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3 years ago

How to evaluate a trigonometric function using reference angle? you can pick

pantera1 [17]

Answer:

How to choose which trig function to use based on an angle? I'm assuming that's simpler form of the question hehe

Step-by-step explanation:

pick an angle, and look at the sides that you HAVE

if you have the side opposite to the angle, and the hypotenuse of the triangle you use sine.

if you have the side adjacent to said angle, and the hypotenuse, you use cosine.

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7 0

3 years ago

Read 2 more answers

What is the value of b in the equation (y Superscript b Baseline) Superscript 4 Baseline = StartFraction 1 Over y Superscript 24

shusha [124]

The value of b is -6.

Explanation:

The expression is $\left(y^{b}\right)^{4}=\frac{1}{y^{24}}$

To determine the value of b, we shall solve the expression.

Applying exponent rule, $\left(a^{b}\right)^{c}=a^{b c}$ , we get,

$y^{4b}=\frac{1}{y^{24}}$

Applying exponent rule, $\frac{1}{a^{b}}=a^{-b}$ , we have,

$y^{4b}=y^{-24}$

The expression is of the form, $a^{f(x)}=a^{g(x)}$ then $f(x)=g(x)$

Applying this rule, we get,

$4b=-24$

Dividing both sides by 4, we have,

$b=-6$

Hence, the value of b is -6.

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3 years ago

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This is easy for you guys you can answer it

Yuki888 [10]

THE CORRECT ANSWER: (-1.5, + 2.5)

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3 years ago

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Ariana has a points card for a movie theater.

pav-90 [236]

The equation which can determine v, the number of visits Ariana must make to earn a free movie ticket is given by :76=25+8.5v

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2 years ago

What is the measurement of angle X​

What is the measurement of angle X