When applying indirect proofs, we assume the negation of the conclusion is true, and show that this assumption would lead to nonsense, or contradiction.
In our case we assume a is not smaller than 7, that is we assume a≥7.
a≥7 then, multiplying both sides by 3:
3a≥21, then, adding both sides 7:
3a+7≥28,
which is a contradiction because 3a+7 is smaller than 28.
So our assumption is wrong, which means the opposite of it is correct.
Answer: assume a≥7
Answer:
35/2
Step-by-step explanation:
y ~ x
y=ky
7=2k
k=7/2
y=(7/2) × 5
y=35/2
<span>If the walkers start at nine and want to join the cyclists at
noon, they will have been walking for 3 hours. At 5 km/h, they would have
walked for 15 km. The cyclists can travel 15 km at 12 km/h in 1.25 hours.
Therefore, the cyclists can start their journey at 10:45 am.</span>
10:4 is the ratio you're looking for.
Answer:
C: 13 billion dollars
Step-by-step explanation:
- 86 + 142 - 43 = 13 billion dollars
