Let
x--------> <span>the speed of the boat in mph
we know that
</span>going upstream the speed is x-7
<span>going downstream the speed is x+7
</span>
let the distance be d
<span>time to go upstream = d/(x-7) </span>
<span>time to go downstream = d/(x+7)
</span>
time going upstream is 3 times going downstream
so
<span>3d/(x+7) = d/(x-7) </span>
<span>divide by d </span>
<span>3/(x+7) = 1/(x-7) </span>
<span>3x-21 = x+7 </span>
<span>2x = 28 </span>
<span>x = 14
</span>
the answer is
<span>the speed of the boat in still water is 14 mph</span>
Answer: 9 cm
Step-by-step explanation:
By multiplying 5 by 3, you get 15. this would also apply to finding the other side of the rectangle, where you multiply 3 by 3 to get 9.
The city do not have up to 5,500 cubic meters of sand that will be needed to combat erosion.
<h3>
Volume</h3>
Volume is the amount of space occupied by a three dimensional object or figure. The volume (V) of a cone is given by:
V = (1/3)πr²h
Where h is the height, and r is the radius
Given that h = 35 m, the radius using Pythagoras theorem:
37² = r² + 35²
r = 12
V = (1/3)π(12)² * 35 = 5280 m³
The city do not have up to 5,500 cubic meters of sand that will be needed to combat erosion.
Find out more on Volume at: brainly.com/question/1972490
Answer:
Step-by-step explanation:
The formula for the volume of a cylinder is V = πr²h.
Here, r = 5cm, and h = 15 cm, and so the volume is:
V = πr²h = π(5 cm)²(15 cm), or:
V = π(25 cm²)(15 cm) = 375π cm³, or approximately 1170 cm³
Answer:
The child has chromosomes from both parents, so the child's shape is based on their parents shape.
Step-by-step explanation:
