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mamaluj [8]
2 years ago
7

What is the value of Y

Mathematics
1 answer:
pshichka [43]2 years ago
6 0

Answer:

y = 150º

Step-by-step explanation:

The sum of internal angles of a triangle must be 180º and the sum of y + (x-20) forms a straight line which is also 180º, so:

2x + x + (x - 20) = 180

4x - 20 = 180

4x = 200

x = 50

x - 20 = 50 - 20

x - 20 = 30

y = 180 - 30

y = 150º

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An elementary school class ran 1 mile in an average of 11 minutes with a standard deviation of 3 minutes. Rachel, a student in t
EleoNora [17]

Answer:

Rachel

Step-by-step explanation:

We need to measure how far (towards the left) are the students from the mean in<em> “standard deviations units”</em>.  

That is to say, if t is the time the student ran the mile and s is the standard deviation of the class, we must find an x such that

mean - x*s = t

For Rachel we have

11 - x*3 = 8, so x = 1.  

Rachel is <em>1 standard deviation far (to the left) from the mean</em> of her class

For Kenji we have

9 - x*2 = 8.5, so x = 0.25

Kenji is <em>0.25 standard deviations far (to the left) from the mean</em> of his class

For Nedda we have

7 - x*4 = 8, so x = 0.25

Nedda is also 0.25 standard deviations far (to the left) from the mean of his class.

As Rachel is the farthest from the mean of her class in term of standard deviations, Rachel is the fastest runner with respect to her class.

8 0
3 years ago
Can anyone one solve 1 - 6 ?
VashaNatasha [74]

(1)

f(x) + g(x) = 3x + 2 + 2x + 5 = 5x + 7

f(x) - g(x) = 3x + 2 - 2x - 5 = x - 3

(2)

f(x) + g(x) = 4x - 1 + 3x - 4 = 7x - 5

f(x) - g(x) = 4x - 1 - 3x + 4 = x + 3

(3)

f(x) + g(x) = - 5x + 3 + 2x - 4 = - 3x - 1

f(x) - g(x) = - 5x + 3 - 2x + 4 = - 7x + 7

(4)

f(x) + g(x) = 3x - 4 - 2x + 3 = x - 1

f(x) - g(x) = 3x - 4 + 2x - 3 = 5x - 7

(5)

f(x) × g(x) = - 2(- x + 7 ) = 2x - 14

(6)

f(x) × g(x) = - 5(2x - 7) = - 10x + 35



5 0
3 years ago
Read 2 more answers
Which value satisfies the inequality 3x+10-2x&lt;-4x+45
anygoal [31]

First to answer

Answer:

x<7

Step By Step Answering:

Step 1: Simplify both sides of the inequality.

x+10<−4x+45

Step 2: Add 4x to both sides.

x+10+4x<−4x+45+4x

5x+10<45

Step 3: Subtract 10 from both sides.

5x+10−10<45−10

5x<35

Step 4: Divide both sides by 5.

5x/5<35/5

x<7

6 0
3 years ago
Three times a number increased by ten equal to twenty less than six times a number . find the number​
kiruha [24]

Answer:

the number is 10

Step-by-step explanation:

3x + 10 = 6x-20

20+10=6x-3x

30=3x

x=10

4 0
3 years ago
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A student randomly selected 5 basketball players after a tournament and recorded the total points each player scored in the game
iragen [17]
Its actually C.... I took the quiz
7 0
3 years ago
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