Answer:
the speed of sound is 12 miles per minute
Step-by-step explanation:
To know the speed we have to divide the distance by the time because the speed of sound is constant and we have to use a formula of uniform rectilinear motion
Uniform rectilinear motion: When an object travels at a constant speed with zero acceleration it is known as uniform rectilinear motion
The distance it gives us is 1 mile and the time it gives us is 1/12 minute
v = speed
v = 1mi / (1/12 m)
v = 12 mi/m
in the result as we can see we have a whole number (12)
the speed of sound is 12 miles per minute
Answer:
It would be 80 miles in 1 hour
Step-by-step explanation:
You divide 560/7
7 goes into 56, 8 times and into 0, 0 times.
560/7=80
Answer:
38
Step-by-step explanation:
x+x+14=90
The perimeter of a rectangle is the sum of twice the length and twice the width. When a diagonal is drawn across the rectangle, two congruent triangles are formed. The legs of the triangle are the sides of the rectangle. Right triangles indicates that we can use the Pythagorean theorem. Let length = xLet width = y Set the equation based on what we know. 2x + 2y = 22 x + y = 11 eq1 x2 + y2 = [√65]2 eq2 We have two equations to work with. x + y = 11 eq1 x2 + y2 = 65 eq2 Substitute eq1 into eq2. From eq1, x = 11 - y x2 = (11 - y)2 x2 = (11 - y)(11 - y) x2 = 121 - 22y + y2 (121 - 22y + y2) + y2 = 65 121 - 22y + 2y2 = 65 2y2 - 22y + 56 = 0 2(y2 - 11y + 28) = 0 2(y - 7)(y - 4) = 0 y = 7 and y = 4 Substitute these y values into eq1 to solve for x. x = 11 - 7 and x = 11 - 4 x = 4 and x = 7 Each pair of solutions has the same dimensions. Shorter side = 4Longer side = 7