MATHEMATICS COLLEGE

A square has a side length 9 cm. What is its area? A square has an area of 9 cm2. What is its side length?

Answers

Answer 1

Answer:

Answer:

Area = 81; Side Length = 3

Step-by-step explanation:

The area of a square is the side lenght squared, and 9² is 81.

The side lengh can be found by taking the square root of the area. √9 = 3

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Write the equation in standard form and then find the center (h, k) and
x^2+8x+ y2 + 4y - 5= 0

Answers

Answer:

Center is at (-4, -2) and the radius = 5.

Step-by-step explanation:

Convert to Standard form:

x^2 + 8x + y2 + 4y - 5= 0

Completing the square:

(x + 4)^2 - 16 + (y + 2)^2 - 4 = 5

(x + 4)^2 + (y + 2)^2 = 5 + 16 + 4

(x + 4)^2 + (y + 2)^2 = 25

(x - h)^2 + (y - k)^2 = r^2 Comparing:-

The center is at (-4, -2) and the radius = 5.

What is x in this problem? someone please help

Answers

X=21
This is because both of those angles are equal, so you would divide 42 by 2 and get 21

I don’t know if it’s g(2(5)(3(5)^2-5-5

Answers

Answer:

B. 135

Step-by-step explanation:

For ...

f(x) = 3x^2 -x
g(x) = 2x -5

f(5) = 3·5^2 -5

= 3·25 -5 = 75 -5 = 70

Then g(f(5)) is ...

g(f(5)) = g(70) = 2·70 -5 = 140 -5

g(f(5)) = 135 . . . . . matches choice B

Let U be a square matrix such that Upper U Superscript Upper TUequalsI. Show that det Uequalsplus or minus1. Assume that Upper U Superscript Upper TUequalsI. Since the desired result is that det Uequalsplus or minus1, an intermediate step must be found which contains the expression det U. Which of the following can be applied to the assumption Upper U Superscript Upper TUequalsI to achieve the desired result? A. det (Upper U Superscript Upper TU)Superscript negative 1equalsdet I B. det (Upper U Superscript Upper TU)equalsI C. (Upper U Superscript Upper TU)Superscript negative 1equalsISuperscript negative 1 D. det (Upper U Superscript Upper TU)equalsdet I Simplify the right side of the equation found in the first step. nothing Which property can be used to simplify the left side of the equation found in the first step? Select all that apply.