I don’t under this pls help thank you
1 answer:
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Answer:
10 hours
Step-by-step explanation:
Given:
Average speed of submarine = 10 mph
Speed of carrier in the opposite direction = 20 mph
Distance between the submarine and carrier = 300 mi
To find:
The time taken so that the distance between them is 300 mi ?
Solution:
The relative speed when they are traveling in opposite direction = 10+20 = 30 mph
Formula:
So, the answer is <em>10 hours</em>.
Answer:
The number of apples bought was 7 and the number of pears bought was 4
Step-by-step explanation:
<u><em>The correct question is</em></u>
Thanh bought 11 pieces of fruit and spent $5.60. If apples cost $0.60 each and pears cost $0.35 each, how many of each kind of fruit did he buy?
Let
x ---->the number of apples bought
y ----> the number of pears bought
we know that
Thanh bought 11 pieces of fruit
so
----> equation A
apples cost $0.60 each and pears cost $0.35 each and Thanh spent $5.60
so
----> equation B
Solve the system of equations by graphing
Remember that the solution is the intersection point both graphs
Using a graphing tool
The solution is the point (7,4)
see the attached figure
therefore
The number of apples bought was 7 and the number of pears bought was 4
Answer:
4π
Step-by-step explanation:
-A circle subtends a total angle of 360 ° from its center.
-The length of an arc is directly proportional to the angle it subtends from the circle's center.
#The arc's length can therefore be calculated as:
Hence, the length of the arc is 4π