Answer:
-1, -4, 2, 4
Step-by-step explanation:
The are ascending
Answer: D. 78cm2
Step-by-step explanation:
SA=B+1/2ph
SA=28+1/2(20)(5)
SA=78cm2
Answer:
440 or 490
Step-by-step explanation:
You have to move all terms involving the variable on one side, and all constant terms on the other side.
To move a term from a side to the other, you have to change its side.
So, for example, if you move 4x from left to right, it will become -4x (you're actually subtracting 4x from both sides):

Similarly, add 5 to both side to get

Finally, divide both sides by 3:

The easiest way to solve this is to write the words mathematically. You're told that the product of 4 and a number, b = 3/5.
That means:
4b (product of 4 and b) =

To solve for b, you want to divide both sides by 4 to get the b by itself on the left of the equation:

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Answer: b = 3/20