Answer:
38.57 feets
Step-by-step explanation:
Given that:
Height of monument, h = 300ft
Shadow of monument, s = 210 ft
Shadow of tree, s = 27ft
Height of tree, = x
Using the relation :
Height / shadow = height / shadow
Monument = tree
300 / 210 = h / 27
Cross multiply
300 * 27 = 210 * h
8100 = 210h
h = 8100 / 210
h = 38.57 feets
Answer:
A(-2,5)
x= -2 , y=5
Step-by-step explanation:
draw the lines for both equations and that will be by finding any points in the lines:
1. sub any value for x to find y in the equation (y=-x+3) :
- When x=0 ⇒ y=-0+3, y=3 (the point is: (0,3)
- When x=1 ⇒ y= -1 +3 , y=2 (the point is: (1,2)
- When x=2 ⇒ y=-2+3, y=1 (the point is: (2,1)
- When x=-1 ⇒ y=-(-1)+3, y=4 (the point is: (-1,4)
- When x=-2 ⇒ y=-(-2)+3, y=5 (the point is: (-2,5)
plot the points in the graph and match them to get the first line for equation(1).
2. sub any value for x to find y in the equation (y=-3x-1) :
- When x=0 ⇒ y=-3(0)-1, y=-1 (the point is: (0,-1)
- When x=1 ⇒ y=-3(1)-1, y=-4 (the point is: (1,-4)
- When x=2 ⇒ y=-3(2)-1, y=-7 (the point is: (2,-7)
- When x=-1 ⇒ y=-3(-1)-1, y=2 (the point is: (-1,2)
- When x=-2 ⇒ y=-3(-2)-1, y=5 (the point is: (-2,5)
Now again plot the points in the same graph and match them to get the second line for equation(2).
When you finish you will have two lines drawn in a graph, the solution will be were the two points intercept, and that will be:
A(-2,5)
x= -2 , y=5
(note: you can check your answer by subbing the value of x in both equations and you should get the answer 5 as the value of y)
1/6 divided by 2 is 1/6 multiplied by 1/2
1/6 * 1/2 = 1/12
1/12 of the shingles for the roof will be in each stack.
Answer:
By multiplying both sides of the equation by
we solve the equation.
Step-by-step explanation:
Given the equation:

in order to solve for x, we need to bring the unknown "x" to the numerator. Such is normally done by first finding the so called "Least common Denominator" (LCD), and using it to multiply both sides of the equal sign to get rid of all denominators in the equation. This is similar in a way to the procedure of cross multiplication.
Notice that the LCD in our case is simply the straight product of all factors in the denominators : 9 * x * 4 = 36 x

Then, in order to solve for the unknown "x" we need to isolate it on one side of the equal sign, so we need to divide both sides by the numerical factor 27 :

Therefore, if we want to make both operations we performed into a single process, what we actually did was multiply by 36 x and divide by 27:

so we can say that we can achieve the solving of the equation in one step by multiplying both sides of the equal sign by "
" :

Answer: The outbound trip is 18 miles per hour
Step-by-step explanation:
Let x represent the speed of the plane.
An aircraft carrier made a trip. Let us assume that this trip was outbound. The trip there took 5 hours.
Distance = speed × time. Therefore
Distance = 5x
The trip back took 6 hours. It averaged 3 mph faster on the trip there then on the return trip. This means that the speed on the trip back is x - 3 mph.
Distance = 6(x-3) = 6x - 18
Since the distance is the same,
5x = 6x - 18
6x - 5x = 18
x = 18
The speed on return or inbound trip would be 18 - 3 = 15 mph