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3 years ago

Which one is it plz help me

Mathematics

2 answers:

postnew [5]3 years ago

5 0

Answer:

Theres nothing to help you with... nothings attached

Nikitich [7]3 years ago

5 0

wheres is the thing that you need help with?

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I need help PLEASE!!!

Stella [2.4K]

9514 1404 393

Answer:

y = -4/3x +23/2

Step-by-step explanation:

The tangent of interest is perpendicular to the radius at the given point on the circle. To find the perpendicular, it helps to know the slope of the radius segment. To find that, we need the center of the circle.

The center of the circle can be found by completing the square for each variable.

(x^2 -2x) +(y^2 +4y) = 20

(x^2 -2x +1) +(y^2 +4y +4) = 20 +1 +4

(x -1)^2 +(y +2)^2 = 25

Comparing this equation to the standard form equation for a circle, we can find the center.

(x -h)^2 +(y -k)^2 = r^2 . . . . . . . circle of radius r centered at (h, k)

The center of circle P is (1, -2).

The slope m' of the line segment between (1, -2) and (5, 1) is given by ...

m' = (y2 -y1)/(x2 -x1)

m' = (1 -(-2))/(5 -1) = 3/4

The slope m of the perpendicular line is the opposite reciprocal of this, so is ...

m = -1/m' = -1/(3/4) = -4/3

The y-intercept of the desired line can be found from ...

b = y -mx . . . . . . . for m=-4/3 and (x, y) = (5, 1)

b = 1 -(-4/3)(5) = 23/3

Then the equation of tangent line AB is ...

y = mx +b

y = -4/3x +23/3

6 0

2 years ago

The length of a side of a triangle is 26 in. A line, parallel to the given side ,divides the triangle into 2 parts of equal area

lubasha [3.4K]

Answer:

13√2

Step-by-step explanation:

The areas of the larger triangle, and the smaller triangle (formed when the larger triangle was cut by the parallel line) are similar. Therefore we can compare their areas:

Area1/Area2 = (Length1)^2/(Length2)^2,

x/2x = (Length1)^2/(26)^2,

1/2 = (Length1)^2/676,

(Length1)^2 = 676/2 = 338

Length1 = √1352 = 13√2

6 0

2 years ago

Rotate the point 603 degrees to within 10 degrees

swat32

Can you show a picture of it

6 0

3 years ago

In a large school, it was found that 71% of students are taking a math class, 77% of student are taking an English class, and 58

Anni [7]

Answer:

P (Math or English) = 0.90

Step-by-step explanation:

* Lets study the meaning of or , and on probability

- The use of the word or means that you are calculating the probability

that either event A or event B happened

- Both events do not have to happen

- The use of the word and, means that both event A and B have to

happened

* The addition rules are:

# P(A or B) = P(A) + P(B) ⇒ mutually exclusive (events cannot happen

at the same time)

# P(A or B) = P(A) + P(B) - P(A and B) ⇒ non-mutually exclusive (if they

have at least one outcome in common)

- The union is written as A ∪ B or “A or B”.

- The Both is written as A ∩ B or “A and B”

* Lets solve the question

- The probability of taking Math class 71%

- The probability of taking English class 77%

- The probability of taking both classes is 58%

∵ P(Math) = 71% = 0.71

∵ P(English) = 77% = 0.77

∵ P(Math and English) = 58% = 0.58

- To find P(Math or English) use the rule of non-mutually exclusive

∵ P(A or B) = P(A) + P(B) - P(A and B)

∴ P(Math or English) = P(Math) + P(English) - P(Math and English)

- Lets substitute the values of P(Math) , P(English) , P(Math and English)

in the rule

∵ P(Math or English) = 0.71 + 0.77 - 0.58 ⇒ simplify

∴ P(Math or English) = 0.90

* P(Math or English) = 0.90

8 0

3 years ago

Round 0.142 to the nearest tenth

hjlf

If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).

If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).

0.142 ≈ 0.1

5 0

3 years ago

Read 2 more answers