Lacey, because you have to do the opposite when you want to get rid of a number. She subtracted 20 because it was originally positive 20. Chris messed up and did not do the opposite, subtraction, and instead he added 20
Since 18 does not have a number that when multiplied by itself equal 18, then it will be a decimal number. You can tell the closest whole number by seeing what is the closest square. In this case we know that 16 is 4 times 4 and the next one would be 5 times 5 to equal 25, so the whole number would be 4.
Now, the easiest way to do this is to get you calculator and take the square root of 18 to get 4.242641. The problem wants it to be to the nearest tenth so 4.2 is your answer. On a number line, if it is in four parts, you will plot it just before the first little line.
Hope this helps! If you are using more small lines in you number line, comment me below and I would be happy to lead you in the right direction.
Answer:
7x-6=85
Step-by-step explanation:
7×number for example x
then subtract 6 from that
then you have 85
Answer:
I think it might be 6
Step-by-step explanation:
You should probably wait for another answer, I did this in Math last year so I think it's 6 but I can't really remember sorry ):
X^2 + 3x - 10 = 0
(x + 5)(x - 2) = 0
one solution is x = 2
