MATHEMATICS HIGH SCHOOL

Work out 25% of 20 metres

Answers

Answer 1
Answer:

Answer:

5 meters

Step-by-step explanation:

We have to calculate 25% of 20 meters

So we rewrite the equation

25% × 20

(25)/(100) × 20

0.25 × 20

= 5 meters

25% of 20 meters is 5 meters

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Distance between (-3 , -3 ) and (-6 , 1)

Answers

Answer:

Step-by-step explanation:

Using the distance formula, and (-3, -3) as (x1, y1) and (-6, 1) as (x2, y2), we obtain sqrt(9+16) = sqrt(25) = 5.

So, the distance between the two points is 5 units.

How do i find the slope

Answers

Answer:

Step-by-step explanation:

Pick 2 points: (-3,2) and (1,-1) I chose these points because they are whole numbers, but you can choose any 2 points

Slope: -0.75 or -3/4; Negative because the line is going down from left to right

y2-y1/x2-x1

-1-2/3-(-3)= -0.75

What is the absolute value of the complex number -4 - square root of 2iA) square root of 14
B) 3 square root of 2
C) 14
D) 18

Answers

The absolute value of the complex numberz=a+bi is |z|=√(a^2+b^2).

Consider the complex number z=-4-√(2)i. For this complex number a=-4 and b=-√(2).

Therefore, the absolute value of this complex number is

|z|=\sqrt{(-4)^2+(-√(2))^2}=√(16+2)=√(18)=3√(2).

Answer: correct choice is B
A) square root of 14

Assuming that there are 10 digits used as telephone number and the area code is a fixed 3 digit number. How many different telephone numbers could be created?

Answers

9,999,999,999,987 Of course, if 'numbers' with leading digits e.g. 0 000 087 654 321, and all zeros, are not counted as valid 'numbers' then there are 13 less possibilities. i.e. There are only 9,999,999,999,987 possibilities.

What is 999999x999999999

Answers

Is this a joke? 
1,062,882

Can anyone help me Factor.
81-25x^2

Answers

that is difference of two squares so the answer is (9-5x)(9+5x)
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