X-3y=3 Solve pls as fast as possible
1 answer:
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Answer:
12.686cm
Step-by-step explanation:
By using pythagoras, we can find CB.
We know that
Therefore,
(it has to be positive since it is distance)
now we look at triangle BCD and use SOH CAH TOA.
Let x person in 1 van and y persons in 1 bus
so for school A took 2x+2y=106
for school B took 8x+y=151
make a system
solve it:
multiply second equation by 2
<span> 2*8x+2*y=2*151</span>
16x+2y=302
second equation minus first we have:
16x+2y-2x-2y=302-106
14x=196
x=14 - persons in 1 van
to find y put x=14 in equation:
2x+2y=106
2*14+2y=106
2y=106-28
2y=78
y=39
Answer: 1 van can carry 14persons, 1 bus can carry 39 persons
so for school A took 2x+2y=106
for school B took 8x+y=151
make a system
solve it:
multiply second equation by 2
<span> 2*8x+2*y=2*151</span>
16x+2y=302
second equation minus first we have:
16x+2y-2x-2y=302-106
14x=196
x=14 - persons in 1 van
to find y put x=14 in equation:
2x+2y=106
2*14+2y=106
2y=106-28
2y=78
y=39
Answer: 1 van can carry 14persons, 1 bus can carry 39 persons