Answer:
a) t = 4000/v
b) t = 4000/(v + 20)
c) see attached workings
Step-by-step explanation:
a) A man jogs 4 km everyday at an average speed of v m/min
As the speed is measured in <u>meters per minute</u>, we need to convert the distance (4 km) into meters:
1 km = 1000 m
⇒ 4 km = 4 x 1000 = 4000 m
distance = speed x time
⇒ time = distance / speed
⇒ t = 4000/v (where t = time in minutes)
b) If his average speed increased by 20 m/min, then his speed would now be (v + 20) m/min
⇒ t = 4000/(v + 20) (where t = time in minutes)
c) Given the man would take 3 min less if his average speed increased by 20 m/min, we can rewrite the second equation as:
t - 3 = 4000/(v + 20)
Now simply substitute the first equation t = 4000/v into the second:
(I have typed this used MS Word and attached, as the equation editor here in Brainly is not working at the moment).
Answer:
Triangle PQR congruent to Triangle TSR by SAS
Step-by-step explanation:
Hope this helps
15xr To the calculated of the reduced frame of 19 division then adding 15 EXR at the end
Answer:
<h3>{44-55}</h3><h3>{52- 59 } are the last two interval s</h3>
Step-by-step explanation:
<h2>To get the class boundaries deduct 0.5 from the first number and add 0.5 to the second number = 4-0.5 = 3.5 </h2><h2> = 11.5 + 0.5 = 11.5 </h2><h2> = 3.5 -11.5 as in the fish class boundary .</h2><h2>same for all other boundaries</h2>
<u>Step-by-step explanation:</u>
Here , we have In August, Cory begins school shopping for his triplet daughters. One day, he bought 10 pairs of socks for $2.50 each and 3 pairs of shoes for d dollars each. He spent a total of $135.97. We need to find What does d equal . Let's find out:
One day, he bought 10 pairs of socks for $2.50 each
Following is the equation for this info:
⇒ 
⇒ 
3 pairs of shoes for d dollars each
Following is the equation for this info:
⇒ 
⇒ 
He spent a total of $135.97
Following is the equation for this info:
⇒ 
⇒ 
⇒ 
⇒
Therefore , .
