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Nikitich [7]
3 years ago
15

Answer the following question with work. -6x+40=220

Mathematics
1 answer:
navik [9.2K]3 years ago
6 0
If you do 220-40 then the second digit of the negative number will equal x.
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Construct perpendiculars image below
Marysya12 [62]

Answer: draw a straight line trough point B, same thing with the second one,for the third you must draw a straight line from the angle across to the segment. (make sure all of the intersections are 90 degrees

5 0
3 years ago
1) On a standardized aptitude test, scores are normally distributed with a mean of 100 and a standard deviation of 10. Find the
Musya8 [376]

Answer:

A) 34.13%

B)  15.87%

C) 95.44%

D) 97.72%

E) 49.87%

F) 0.13%

Step-by-step explanation:

To find the percent of scores that are between 90 and 100, we need to standardize 90 and 100 using the following equation:

z=\frac{x-m}{s}

Where m is the mean and s is the standard deviation. Then, 90 and 100 are equal to:

z=\frac{90-100}{10}=-1\\ z=\frac{100-100}{10}=0

So, the percent of scores that are between 90 and 100 can be calculated using the normal standard table as:

P( 90 < x < 100) = P(-1 < z < 0) = P(z < 0) - P(z < -1)

                                                =  0.5 - 0.1587 = 0.3413

It means that the PERCENT of scores that are between 90 and 100 is 34.13%

At the same way, we can calculated the percentages of B, C, D, E and F as:

B) Over 110

P( x > 110 ) = P( z>\frac{110-100}{10})=P(z>1) = 0.1587

C) Between 80 and 120

P( 80

D) less than 80

P( x < 80 ) = P( z

E) Between 70 and 100

P( 70

F) More than 130

P( x > 130 ) = P( z>\frac{130-100}{10})=P(z>3) = 0.0013

8 0
3 years ago
PLEASE HELP, I'LL MARK BRAINLIEST 3 QUESTIONS.... 36 POINTS!!! i'll help w/ any other subject or if u need anything i just need
Tomtit [17]

Answer:

Step-by-step explanation:

What give me the question

3 0
3 years ago
Tim's mother is 32 years old. she is 4 times as old as tim. what equation could be used to find tim's age
bija089 [108]
32= 4x

That would be the equation and x would then be 8
hope this helps
6 0
3 years ago
A certain number added to its square is 30. Find the number
Alex Ar [27]
X+x²=30
x²+x-30=0
(x+6)(x-5)=0
x=-6 or x=5
5 0
3 years ago
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