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Ivahew [28]
2 years ago
9

Find each unknown angle measurement.

Mathematics
1 answer:
Alex Ar [27]2 years ago
5 0

Answer:

angle(2) = 118 degree

angle(3) = 118 degree

angle(4) = 62 degree

Step-by-step explanation:

To find angle 2 :

62   + angle{2} = 180 \\ angle{2} = 180 - 62 = 118 \: degree

The rule (head to head):

angle(2) = angle(3) = 118 degree

And the last one is angle(4) which is the same thing:

angle(4) = angle(1) = 62 degree

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The Christmas Bird Count (CBC) is an annual tradition in Lexington, Massachusetts. A group of volunteers counts the number of bi
Lerok [7]

Answer:

(5.216) mean = 61.71

(5.217) standard deviation = 8.88

(5.218) P(X>=60) = 0.9238

(5.129) L = 79, U = 69

(5.130) P(X> or = U) = 0.7058

Step-by-step explanation:

The table of the statistic is set up as shown in attachment.

(5.216) mean = summation of all X ÷ no of data.

mean = 432/7 = 61.71 birds

(5.217)Standard deviation = √ sum of the absolute value of difference of X from mean ÷ number of data

S = √ /X - mean/ ÷ 7

= √551.428/7

S = 8.88

(5.218) P (X> or = 60)

= P(Z> or =60 - 61.71/8.8 )

= P(Z>or= - 0.192)

= 1 - P(Z< or = 0.192)

= 1- 0.0762

= 0.9238

(5.219)the 15th percentile=15/100 × 7

15th percentile = 1.05

The value is the number in the first position and that is 79,

L= 79

85th percentile = 85/100 × 7 = 5.95

The value is the number in the 6th position, and that is 69

U = 69

5.130) P(X>or = 60)

= P(Z>or= 69 - 61.71/8.8)

= P(Z> or = 0.8208)

= 1 - P(Z< or = 0.8209)

= 1 - 0.2942

= 0.7058

3 0
3 years ago
Can somebody help? Please
tatiyna
90-73=17
answer:17 hahahaaha
6 0
3 years ago
Read 2 more answers
15+9=? (5+3) What number is missing from the expression?
Airida [17]

Answer:

<h3>\boxed{ \boxed{ \bold{  \mathsf{3}}}}</h3>

Step-by-step explanation:

Let the missing number be 'x'

⇒\mathsf{15 + 9 = x(5 + 3)}

Distribute x through the parentheses

⇒\mathsf{15 + 9 = 5x + 3x}

Swap the sides of the equation

⇒\mathsf{5x + 3x = 15 + 9}

Add the numbers

⇒\mathsf{5x + 3x = 24}

Collect like terms

⇒\mathsf{8x = 24}

Divide both sides of the equation by 8

⇒\mathsf{ \frac{8x}{8}  =  \frac{24}{8} }

Calculate

⇒\mathsf{x = 3}

Hope I helped!

Best regards!

4 0
2 years ago
Solve to find the value of x.
Tresset [83]

Answer:

x=12

Step-by-step explanation:

We know that a right angle is 90 degrees. So we can make the equation 35+4x+7=90. Now, we can solve fore X! We can combine 35 and 7 to make the equation 4x+42=90. In order to isolate x we have to subtract 42 from both sides, getting us the equation 4x=48. Now, in order to isolate x we must divide each side by 4, getting us the equation 12=x.  To prove that x=12, we can subsitute x for 12.  This means that we can do 35+4(12)+7=90. Or, 35+48+7 =90, which simplified, is 90=90, making x=12 true. Hope this helps :)

6 0
2 years ago
Rey paid $91 for a watch that was on sale for 30% off. Grace and Curtis were debating how much the original price was. Grace sai
Mariulka [41]

Answer:

Grace is right

Step-by-step explanation:

91 x 0.30 = 27.3

91 plus 27.3 equals to 118.3

6 0
3 years ago
Read 2 more answers
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