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Sonja [21]
3 years ago
11

Apply a 90 degree rotation to the point (1, 2)

Mathematics
2 answers:
Makovka662 [10]3 years ago
7 0
Hmm I use to know this wait a second I’ll answer it
12345 [234]3 years ago
6 0

Answer:

(-1,2)

Step-by-step explanation:

90 degree rotation from (a,b) is (-a,b)

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Solve for x: x^2 + 14x + 49
Kaylis [27]

Answer: -7twice

Step-by-step explanation:

This is a question on root of quadratic equation. The interpretation of the question

x² 14x + 49 is

x² + 14x + 49 = 0.meaning that we are to find two possible values for x that will make the expression equal 0.

We can use any of the methods earlier taught. For the purpose of this class, I am using factorization methods

x² + 14x + 49 = 0

Now, find the product of the first and the last terms, is

x² × 49 = 49ײ

Now find two terms such that their productbis 49x² and their sum equals 14x, the one in the middle.

We have several factors of 49x² but only one will give sum of 14x. Because of the time, I will only go straight to the required factors .

49x² = 7x × 7x and the sum gives 14x the middle terms..

Now we now replace the middle one by the factors and then factorize by grouping.

x² + 14x + 49 = 0

x² + 7x + 7x + 49 = 0

x(x + 7) + 7(x + 7) = 0

(x + 7)(x + 7). = 0

Now to find this value of x,

x + 7 = 0

x. = -7twice.

The root of the equation = -7twice.

3 0
3 years ago
Find the approximate area of the circle below. (Use 3 for \pi)
Marat540 [252]

Answer:

75 in²

Step-by-step explanation:

(see attached for reference)

recall that the formula for area of a circle is given by

Area = π r²

where

π = given to be 3

r = radius given as 5 in

simply substituting the values into the equation:

Area = π r²

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Answer:

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4 years ago
In the right triangle below, tanA = 0.45. What is the approximate length of AB?
garik1379 [7]
In the right triangle ABC wherein AB is the hypotenuse, BC is the opposite and CA is the adjacent tanA=0.45. The approximate length of AB which is the hypotenuse is 22, Opposite (BC) is 9 and Adjacent (CA) is 20. You need to use pythagorean formula in getting the length of AB.

YOUR ANSWER IS (22).
6 0
4 years ago
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