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3 years ago

15 POINTS!

Mathematics

1 answer:

Oliga [24]3 years ago

8 0

Answer:

y = 2x + 1

Step-by-step explanation:

Slope-int form: y = mx + b
m = slope or rise/run
b = y-intercept

Given:

Point (2, 5)
m (slope) = undefined

When a slope is undefined, the line is a vertical line (it rises but doesn't "run").

To find m, use the given point's x-coordinate because the line you're trying to find will run vertically through that point.

(x, y) = (2, 5); x = 2
m = 2

Now the equation becomes y = 2x + b.

To find b, substitute the given point and the found slope into the formula, then solve for b.

5 = 2(2) + b
5 = 4 + b
5 - 4 = b
b = 1

Now that you know what b is, you can substitute b into the equation:

y = 2x + 1

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3 years ago

Read 2 more answers

The ages of the members of a gym have a mean of 4747 years and a standard deviation of 1111 years. what can you conclude from c

Bond [772]

Chebyshev came up with the limits on how much or how many of the data must lie close to the mean. In specific for any positive k, the proportion of the data that lies within k standard deviations of the mean is at least: 

1 - 1/k²

In this problem the mean is 47 yrs therefore:

(47 – 17.3) = 29.7 = (76.7 - 47)

The value of k is calculated using the formula:

29.7 / 11 = 2.7 = k

So the % of gym members aged between 19.4 and 76.6 is: 

1 - 1 / (2.6)² = 0.863 = 86.3 %

Therefore 86.3% of the gym members are aged between 19.4 and 76.6

5 0

3 years ago

Pratap puri Row 22 miles down a river in two hours but the return trip took him 5 1/2 hours find the rate pratap Control in Stil

Natalija [7]

Answer:

x= 7.5 mile/h

y= 3.5 miles / h

Step-by-step explanation:

Given x and y

so, x+y = speed down river

and x-y= speed up river

using

travel time = distance / speed for each case;

we get;

22/x+y=2 ---(1)

and

22/x-y=5.5 -----(2)

Solving equations simultaneously

eq 1 gives

2x+2y=22 ---(3)

eq 2 gives

5.5x-5.5y=22 ----(4)

Multiply eq 3 by 2.75

==> 5.5x+5.5y=60.5 --- (5)

adding eq 4 with eq 5

==> 11x =82.5

==> x= 7.5 miles/h

put this value in eq 3

==> 2(7.5)+2y=22

==> 2y=22-19.8

==> 2y=7

==> y = 3.5

4 0

3 years ago

Roger goes to a restaurant with Cathy. They order an appetizer of calamari for $8. Roger has a glass of red wine for $4 and Cath

Schach [20]

Answer:

13.8

Step-by-step explanation:

8+4+5=17

26×2=52

17+52=69

69×.20=13.8

8 0

2 years ago

I really need help find x in this triangle

arsen [322]

Answer:

x = 5

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Sum the 3 angles and equate to 180

72 + 6x + 2 + 17x - 9 = 180

23x + 65 = 180 ( subtract 65 from both sides )

23x = 115 ( divide both sides by 23 )

x = 5

5 0

2 years ago