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2 years ago

Slove all of it please 100 points

Mathematics

2 answers:

Gre4nikov [31]2 years ago

7 0

Answer:

$\boxed{\mathrm{view \: explanation}}$

Step-by-step explanation:

Question 1:

$5x+y-7=0$

Write in slope intercept form.

$y=-5x+7 \\m=-5,b=7\\9x+7y-14=0$

Write in slope intercept form.

$7y=14-9x\\y=-9x/7 +14/7\\y=-9/7 + 2\\m=-9/7, b=2$

Question 2:

$x+y=1000\\4x+3y=3600$

$3x+3y=3000\\4x+3y=3600\\3x+3y-(4x+3y) = 3000-3600\\3x+3y-4x-3y=-600\\-x=-600\\x=600$

$x+y=1000\\600+y=1000\\y=1000-600=400$

Tickets sold:

Adults:

$x=600$

Kids:

$y=400$

Katyanochek1 [597]2 years ago

4 0

Answer:

Step-by-step explanation:

5x+y-7=0 isolate y

y=-5x+7 (m=-5,b=7)

9x+7y-14=0

7y=14-9x ( divide both sides by 7)

y=-9x/7 +14/7

y=-9/7 + 2 (m=-9/7, b=2)

x+y=1000

4x+3y=3600 ( multiply the first equation by 3 to eliminate y)

3x+3y=3000

4x+3y=3600 ( subtract the two equations)

3x+3y-(4x+3y)=3000-3600

3x+3y-4x-3y=-600

-x=-600

x=600 ( substitute x in the equation)

x+y=1000

600+y=1000

y=1000-600=400

check : x+y=1000 , (600+400)=1000

check : 4x+3y=3600 = (4(600)+3(400))=2400+1200=3600

how many tickets are sold :

adults x=600/4=150

kids (y)=400/3=133 tickets+1 dollars left

unless( x represent kids then x=200, y represent adult = 100)

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Answer:

For a normal distribution 68% of data falls within one standard deviation from mean on both sides of mean

Step-by-step explanation:

A normal distribution's graph is a bell shaped curve that is completely described by its mean and standard deviation. Standard deviation is measured in terms of distance from mean.

34% of data is covered in one standard deviation from mean on one side.

Therefore, for a normal distribution 68% of data falls within one standard deviation from mean on both sides of mean ..

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For the Community Gym:
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Monthly fee = $55
So for the 1st month total charge = $(50 +55)
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So after the 2nd month total payment = $(105 + 55)
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After 3rd month total payment = $(160 + 55)
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After 4th month total payment = $(215 + 55)
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After 5th month total payment = $(270 + 55)
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After 6th month total payment = $(325 + 55)
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Monthly Charge = $45
So for the 1st month the member pays = $(200 + 45)
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2 years ago

9) What 2 numbers have a total of 28 and a difference of 6?

Vedmedyk [2.9K]

Answer:

Sum: 17 + 11 = 28

Difference: 17 - 11 = 6

Step-by-step explanation:

The sum of x and y is 28. In other words, x plus y equals 28 and can be written as equation A:

x + y = 28

The difference between x and y is 6. In other words, x minus y equals 6 and can be written as equation B:

x - y = 6

Now solve equation B for x to get the revised equation B:

x - y = 6

x = 6 + y

Then substitute x in equation A from the revised equation B and then solve for y:

x + y = 28

6 + y + y = 28

6 + 2y = 28

2y = 22

y = 11

Now we know y is 11. Which means that we can substitute y for 11 in equation A and solve for x:

x + y = 28

x + 11 = 28

X = 17

Summary: The sum of two numbers is 28 and their difference is 6. What are the two numbers? Answer: 17 and 11 as proven here:

Sum: 17 + 11 = 28

Difference: 17 - 11 = 6

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2 years ago

Read 2 more answers

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Answer:

1. I, II,

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Yes, because 4 sides are congruent so it makes the two diagonals perpendicular bisectors

II. Diagonals bisect the angles from which they are drawn

Yes, That is the property of the diagonal!

III. Diagonals form four congruent isosceles right triangles.

No, only two pairs of right triangles are congruent and sometime the side of each pair are different to each other.

Hence, we choose I and II

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