physics
A downhill skier is on top of a hill at a height of 30.00 meters. How fast will he be moving when he is at level portion at the bottom of the hill?
Number Theory
16 :)
Math (Combinatorics)
Thanks ravi and ashu :)
Math (Combinatorics)
In the plane, the points with integer coordinates are called lattice points. Suppose a flea in the plane jumps from one lattice point to another. Each jump is one unit to the right, one unit to the left, one unit up, or one unit down. If the flea starts at the origin and makes...
Math (Combinatorics)
How many 4 digit positive integers have the ones digit a multiple of 1, the tens digit a multiple of 2, the hundreds digit a multiple of 3 and the thousands digit a multiple of 4?
Math (Geometry-Vectors)
Let θ be the angle between two vectors v and u . If v*u =12, |v|=2, |u|=6√2 and 0∘<θ<180∘, what is the value of θ (in degrees)?
Math (Geometry)
Square ABCD has M as the midpoint of AB, N as the midpoint of BC, P as the midpoint of CD and Q as the midpoint of MP. If [AMNPDQ]=20, what is the value of [ABCD]? Details and assumptions [PQRS] refers to the area of figure PQRS.
Math (Geometry)
In right triangle ABC, we are given that ∠ABC=90∘ and AC=34. D is a point on line segment BC such that BD=12,DC=18. What is the length of AD?
math
So David, you mean, x + y = 11 x - y = 4 x = 7.5 y = 3.5 Then we need to substitute y into the original equation? x + 3.5 = 11 x = 7.5 x - 3.5 = 4 x = 7.5 Adding the values lead x = 15?
Math (Quadratic Function)
Suppose p(x)=ax^2+bx+c is a quadratic polynomial satisfying p(7)−p(3)=214. Determine the value of p(9)−p(1).
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