Distance = rate (speed) x time
d = (6km/h)(2.33 hrs) (needed to convert 2h 20 mins to hours)
d = 13.98 km
Answer:
Step-by-step explanation:
A system of linear equations can help solve questions like this, that don't give "any" clue as to how many people are on either a van or a bus. Here you just need to interpret the question; at the bottom, it says that <em>x</em> represents the number of students on vans and <em>y</em> represents the number of students on a bus. In other words, for each school, the total number of students going on the field trip are the number of students on vans and the number of students on buses. Hope this helps :D
Answer:
93%
Step-by-step explanation:
28 divided by 30= 0.93
0.93= 93%
So, how much acid is there in 6 gallons? well is 20% acid or (20/100), so the amount of acid in it just (20/100) * 6 or 1.2, the rest is say water.
now, if we want a 90% solution, and say we add "y" gallons, how much acid is in it? well (90/100) * y, or 0.9y.
now let's add "x" gallons of pure acid, now, pure acid is just pure acid, so is 100% acid, how much acid is there in it? (100/100) * x, or 1x or just x.
we know whatever "x" and "y" amounts are, they -> x + 6 = y
and we also know that x + 1.2 = 0.9y