Answer:
2/7 + (-3/4) + (-2/7) + 4/3
If we look at 2/7 and (-2/7), we can see that both of them combined will get you a result of 0, so let's do that first.
2/7 + (-2/7) = 0
Now we're left with;
(-3/4) + 4/3
Make sure to convert both fractions into having a common denominator,
[They both have a common denominator of 12], so:
(-3/4) = (-9/<u>12</u>)
4/3 = 16/<u>12</u>
Add them:
(-9/12) + 16/12
16/12 - 9/12
= <u>7/12</u>, which cannot further be simplified.
The number line has small marks at each tenth and a big mark at each whole number. So, if you wanted to do -6.3, then you would do the same thing you did with -5 1/2(5.5) and count, in this example, three tick marks to the left of the -6 to get where -6.3 is. Same for all of the other ones there.
Deletion: CATTCACG
insertion: CATTTCACACG
inversion: CATTGCACAC
duplication: CATTCACACCACG
substitution: CATTCACACA
Let x represent the number of liters of 50% acid Theresa puts into the mix. The the number of liters of 30% acid will be (420-x). The total amount of acid in the final solution will be ...
0.50x + 0.30(420-x) = 0.45(420)
0.20x + 126 = 189 . . . . . . . . . . . . . . . simplify
0.20x = 63 . . . . . . . . . . . . . . . . . . . . . subtract 126
x = 63/0.20 = 315 . . . . . . . . . . . . . . . liters of 50% solution
(420-x) = 420-315 = 105 . . . . . . . . . liters of 30% solution
Theresa should mix ...
105 liters of 30% solution
315 liters of 50% solution
Answer:
p
Step-by-step explanation:
