Answer:
C. 60°
Step-by-step explanation:
because all angles in a triangle sum up to 180°
60°+60°+60°=180°
It can be done.
You must take a few steps to set it up, but then you are able to count 7 minutes. The setup makes you be able to time 2 minutes on the 5-minute sandglass and then you do another 5 minutes on the same sandglass.
Setup:
Start both sandglasses at the same time. When the 5-minute sandglass runs out, the 8 minute sandglass has 3 minutes of sand left. At this moment, start the 5 minute sandglass again.
When the 8-minute sandglass finishes the remaining 3 minutes, the 5-minute sandglass has 2 minutes left.
Actual timing of 7 minutes:
Let the 2 minutes pass, and immediately turn over the 5-minute sandglass to count an addition 5 minutes. The last 2 minutes of the 5-minute sandglass plus an additional 5 minutes of the 5-minute sandglass add to 7 minutes.
We know that
<span>The width of stamp M is 4/3 inches, and the length is 7/5 inches.
</span>so
The width of stamp P is (4/3)/(7/6)------> 24/21 in-------> 8/7 in
The length of stamp P is (7/5)/(7/6)------> 42/35 in-------> 6/5 in
the answer is
The length of stamp P is 6/5 in
I believe the answer should be B
Answer:
t² - 7 t + 6 = 0; es una ecuación de segundo grado en t. Sus raíces son: t = 6, t = 1; la segunda solución es físicamente imposible. Uno solo de ellos no puede llenar la piscina en menos tiempo que los dos juntos. Por lo tanto uno de ellos demora 6 horas y el otro 6 - 3 = 3 horas.
