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Liono4ka [1.6K]
3 years ago
7

How many degrees there in 3/5 right angleA. 180B. 90C. 150D. 54​

Mathematics
1 answer:
Natalija [7]3 years ago
8 0

Answer:

D. 54​

Step-by-step explanation:

Right angle = 90°

3/5 of 90°

3/5 × 90°

270 ÷ 5 = 54°

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98. What is the sum of the first 27 terms in the arithmetic series 25 +19+13 + ...?​
jeka57 [31]

Answer:

sum of the first 27 terms = -1431

Step-by-step explanation:

<h3>arithmetic series sum of the first n terms formula:</h3>

s_{n}  =  \frac{n}{2}  (2a + (n - 1)d)

n = 27 terms

first term, a = 25

common difference, d = 19 - 25 = -6

substitute the values into the formula

s_{27} =  \frac{27}{2} (2(25) + (27 - 1)( - 6))

s_{27} = 13.5(50 + 26( - 6))

s_{27} = 13.5(50 - 156)

s_{27} = 13.5( - 106)

s_{27}  =  - 1431

4 0
3 years ago
A line of best fit predicts that when x equals 30, y will equal 34.215, but y actually equals 32. What is the residual in this c
Katarina [22]

Answer: A. - 2.215

Step-by-step explanation:

• A residual is the difference between the actual value and the predicted value in a regression model. It represents the vertical distance from the actual point to the point on the regression line.

\text{Residual=Actual value of y -predicted value of y}\\\\\Rightarrow\text{Residual}=32-34.215\\\\\Rightarrow\text{Residual}=-2.215

Hence, the residual in this case = -2.215

4 0
3 years ago
Help me please! I'm so terrible at math
Xelga [282]
You have to take log 10/ log 3 and round to the two decimal places. Your answer should be c- 0.48
5 0
3 years ago
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consuela's living room is a rectangle with an area of 360 square feet. the width of the living room is 5/8 its length. what is t
Aleks [24]
Area of Consuela's rectangular living room = 360 square feet
Let us assume the the length of the living room = x
Then
width of the living room = (5/8) * x
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Then
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x^2 = 2880/5
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Then
The length of the rectangle is = 24 inches
And 
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3 0
3 years ago
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Alex73 [517]

Answer:

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Step-by-step explanation:

count on your fingers

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