Answer:
x = 2.5
or
x = 
Step-by-step explanation:
18x + 6 + 4 = 55
18x + 10 = 55
18x = 55 - 10
18x = 45
x = 2.5
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Answer:
pitcue not clear
Step-by-step explanation:
16,900,000 in scientific notation is 16.9 times 10^7.
When you move the decimal point to the 1, it goes 7 spaces to the left, so the exponent will be a positive 7.
What does "well defined" mean to you, in this situation?
What makes up this set is very clear: "1st graders," "Maple Elem. School," "male." No ambiguity here. How does this relate to the concept of "well defined set?"
