Answer:
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Step-by-step explanation:
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80% converted to a decimal is 80/100=0.8
Multiply the total with the percent 685*0.80
The answer is 540
Answer:
5/12
Step-by-step explanation:
less than 6 means 1,2,3,4 or 5 (5/6)
heads is 1/2
5/6 times 1/2
5/12
Answer:
D
Step-by-step explanation:
a perfect square trinomial is

factorized is

so as you can see option A and B can't be, because they have -49y^2 and it has to be plus
so the other options are C and D
in the trinomial a=4 and b=\pm 7
the roots of a^2 and b^2

so it's option d with b=-7

Consecutive numbers can be written as such:
n + (n + 1) = 73
Open the parentheses and simplify:
2n + 1 = 73
Subtract 1 from both sides:
2n = 72
Divide both sides by 2:
n = 36
The numbers are 36 and 37