Answer:
The speed of the faster cyclist is 15 miles per hour
Step-by-step explanation:
Let the speed of the slower cyclist be x miles per hour
The speed of the faster is 3 times this
Mathematically, we have this as 3 * x miles per hour = 3x miles per hour
Now;
distance = speed * time
In 4 hours, the distance covered by the slower will be;
x * 4 = 4x miles
The faster;
3x * 4 = 12x miles
Since they are riding opposite each other, they would have covered a total distance of 80 miles when they meet
Thus, we have that;
12x + 4x = 80
16x = 80
x = 80/16
x = 5
The speed of the faster is;
3x miles per hour
Substitute the value of x here
That will be;
3 * 5 = 15 miles per hour
9514 1404 393
Answer:
2/5
Step-by-step explanation:
After paying 1/3 in tax, 2/3 of Sally's paycheck remains.
After paying 2/5 of that, 3/5 of that 2/3 remains. The remaining fraction is ...
(3/5)(2/3) = 2/5
After the indicated payments, 2/5 of Sally's paycheck remains.
What’s the shape of it?
If it’s a rectangle 20
Bot something with more than 4 sides 100cm
Answer:
192 cm^3/min
Step-by-step explanation:
Differentiating the volume expression, we get ...
dV/dt = 2xh(dx/dt) +x^2(dh/dt)
We are given that ...
x = 4 cm, dx/dt = 2 cm/min, h = 15 cm, dh/dt = -3 cm/min
Putting these values into the formula for volume rate of change, we get ...
dV/dt = 2(4 cm)(15 cm)(2 cm/min) +(4 cm)^2(-3 cm/min)
= 240 cm^3/min -48 cm^3/min
dV/dt = 192 cm^3/min
Answer:
x=-3
Step-by-step explanation:
2x+6144=2
2x=2-6144
2x=-6142
x=-6142÷2
x=-3071
