Answer:
That's incorrect. The simplest way to show this is by evaluating the functions at a given point. Let's say x=0, then:
Sin(-x) = Sin(0) = 0
-cos x = -cos (0) = -1
Therefore, Sin(-x)≠-cos x.
Step-by-step explanation:
left to right.
the smallest numbers are on the left, the largest in the right.
all the numbers in the line are sorted.
so, going from left to right the numbers get continuously larger (no exception), and when going from right to left, they get continuously smaller.
remember that the negative numbers are smaller than the positive numbers. so, the negative numbers (if there are any in your case) are on the left side.
and negative numbers get smaller by "seemingly increasing" : -1 is larger than -2 and so on.
so, the range of the negative numbers starts on the left side with the "largest" negative number (but when you think about it, it IS the smallest number) and their absolute value gets smaller until they reach 0, and then the positive numbers start from small to large.
this also asked to fractions and mixed fraction numbers :
e.g. -2 1/2 is smaller than -2 and larger than -3.
because it is -2 + -1/2 = -2 - 1/2 = -2 1/2.
in that sense it is the same principle as with positive numbers :
2 1/2 = 2 + 1/2
-2 1/2 = -2 - 1/2
Answer:
Assuming x is the number, then 
Step-by-step explanation:
If the product of a number and 5 is 8, the equation becomes:
(assuming x is the unknown number).
We can isolate the variable x by dividing both sides by 5.
Hope this helped!
<h3>
Answer: 30 feet</h3>
===================================================
Explanation:
He has 90 feet of fencing overall. This is the perimeter of the rectangle as its the distance around all four sides.
Two of the opposite sides are the width = 15 ft. So we have 15+15 = 30 feet taken up and 90-30 = 60 feet left for the other two opposite sides to add to. Call each of those sides x
x+x = 60
2x = 60
x = 60/2
x = 30
The other side must be 30 feet long.
This rectangle is 30 by 15
perimeter = 30+15+30+15 = 45 + 45 = 90
which helps confirm we have the right answer
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Or you can solve this way
P = 2*(L+W) is the perimeter of a rectangle with length L and width W
Plug in the perimeter P = 90 and the width W = 15. Solve for L
P = 2*(L+W)
90 = 2*(L+15)
2(L+15) = 90
L+15 = 90/2
L+15 = 45
L = 45-15
L = 30
Answer: Substitution
Step-by-step explanation:
Because you know A is equal to B, you can substitute A for B in any mathematical equation. Essentially, you are switching mA $ mB.
