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0

f(x) means a function of x. It is equivalent to y=. Therefore you can set the equations equal to each other and solve for x.

GuestSep 12, 2013

0

(-1)^2 = (-1)*(-1) = 1
-1^2 = -1*1 = -1
(-2)^3 = (-2)*(-2)*(-2) = -8
-2^3 = -2*2*2 = -8

So (-1)^2x(-2)^3 = 1x(-8) = -8
And -1^2x(-2^3) = -1x(-8) = 8

So its not the same.

GuestSep 12, 2013

+259

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log ab^2 = log(b^2, a) = 2log(b,a) = 2log(7,3)

scrutinizerSep 12, 2013

+259

0

scrutinizerSep 12, 2013

0

length of the ladder is the hypotenuse: H = 8m
The distance is the adjacent side: A = 3m
So we've got the equation: cos(a) = A/H
a = arccos(A/H)

This has to be between 60° and 78°: 60° < a < 78°
a = arccos(A/H) = arccos(3m/8m) = 67.98°

60° < 67.98° < 78° ✔

GuestSep 12, 2013

0

8[20-9(9-5)^2]
=8[20-9(4)^2]
=8[20-9(16)]
=8[20-144]
=8[-124]
=-992

GuestSep 12, 2013

0

My Question: What do you mean by 'What confuses me is the angle being inbetween 60-78?'?

GuestSep 12, 2013

0

I assume the question is:
( 9 * t ) ² + ( t ² + 2 )

So, after squaring, it becomes:
81t ² + t ² + 2
= 82t ² + 2 (final answer)

GuestSep 12, 2013

0

GuestSep 12, 2013

0

0.0000002 m convert to cm you need to multiply 100, so
0.0000002 m = 0.00002 cm
1 cm - 0.00002 cm = 0.99998 cm

You didn't tell me it should be in which unit, so I used cm. Hope it helps!

GuestSep 12, 2013

0

1
6

A fraction is basically just another way to write division.

GuestSep 12, 2013

0

So......I still don't understand the question.
By the way, thanks for the explanation, Guest.
The answer is (Z "U" Q) = { 16 , -8 , 0 , -1/9 , 6.4 , 2 , sqrt(2.89) }??

GuestSep 12, 2013

0

Z is a set of integers.
Q is a set of rational numbers.

64/4 = 16 is a part of Z and Q
-8 = -8/1 is a part of Z and Q
0 = 0/1 is a part of Z and Q
-1/9 is a part of Q
6.4 = 32/5 is a part of Q
sqrt(4) = 2 = 2/1 is a part of Z and Q
sqrt(-9) = sqrt(-1)*sqrt(9) = i*3 is neither a part of Z or Q (would be a part of C and H)
sqrt(2.89) = sqrt(289/100) = sqrt(289)/sqrt(100) = 17/10 is a part of Q
sqrt_3(144) = sqrt_3(2^4*3^2) = sqrt_3(2^3)*sqrt_3(2*3^2) = 2*sqrt_3(2*3^2) is neither a part of Z or Q

Z = {16, -8, 0, 2}
Q = {64/4, -8, 0, -1/9, 6.4, sqrt(4), sqrt(2.89)}

GuestSep 12, 2013

0

15% equals 15/100 of something. So 15% of 89.99 equal 89.99 * 15/100 = 13.4985.

GuestSep 12, 2013

0

Is the "*" and the "x" same? If it is, then
10 x 2 x -1 x (64 2/3)
= -20 x (64 2/3)
= -1280 40/3
= -1293 1/3

GuestSep 12, 2013

0

The whole question is;
From the set of numbers,
¶ = { 64/4 , -8 , 0 , -1/9 , 6.4 , square root(4) , square root(-9) , square root(2.89) , cube root(144) }
state the two different classifications of the numbers denoted by (Z "U" Q)

Anyone knows what it means, can answer me please??

GuestSep 12, 2013

0

GuestSep 12, 2013

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Alice when working with percentages, remove the % and move the decimal place to the left twice.

so 80% of 240,000 -> .8 * 240,000 -> 192,000

so 800% of 240,000 -> 8.00 * 240,000 -> 1,920,000

GuestSep 12, 2013

0

GuestSep 12, 2013

0

http://en.wikipedia.org/wiki/Set_(mathematics)#Basic_operations

GuestSep 12, 2013

0

It's a bit like "+", so "Z" and "Q" would be all integers and rational numbers

GuestSep 12, 2013

0

1/2(10p+6)-(p-5)
=(5p+6)-(p-5)
=5p+6-p+5
=4p+11

GuestSep 12, 2013

0

You want to solve this in algebra?

GuestSep 12, 2013

0

2+4(3)-6/2+7(2)=2+12-3+14
=14-3+14
=11+14
=25

GuestSep 12, 2013

0

You can use "Microsoft Word."
You can go to "insert" and click on Formula's or "symbols".

GuestSep 12, 2013

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