Answer:
23+7-2x=8x
We simplify the equation to the form, which is simple to understand
23+7-2x=8x
We move all terms containing x to the left and all other terms to the right.
-2x-8x=-23-7
We simplify left and right side of the equation.
-10x=-30
We divide both sides of the equation by -10 to get x.
x=3
Step-by-step explanation:
Answer:
Step-by-step explanation:
In this problem, we have:
H = 452 m is the height of the Petronas tower
h = 1.75 m is the height of the woman
d = 120 m is the distance between the woman and the base of the tower
First of all, we notice that we want to find the angle of elevation between the woman's hat the top of the tower; this means that we have consider the difference between the height of the tower and the height of the woman, so
Now we notice that 
and 
are the two sides of a right triangle, in which the angle of elevation is 
. Therefore, we can write the following relationship:
since
H' represents the side of the triangle opposite to
d represents the side of the triangle adjacent to
Solving the equation for , we find the angle of elevation:
Answer:
(
7
n+
3
) (
n
+
7
)
Step-by-step explanation:
factor by grouping
Answer:
The actual park has 0.7776 square meters
Step-by-step explanation:
To solve this we first have to find the value of the scale
We know that the width of the model is 8cm and that of the true park is 72cm², so if we divide 72 by 8 we will obtain the value of the scale
72 / 8 = 9
To find out how much the park area has, the park first we have to multiply 96cm² by the scale
As the scale of 9 is made for width and length, when we calculate the area it will be multiplied 2 times by 9, so to calculate the real area we have to multiply it 2 times
96cm² * 9 * 9 = 7776cm²
if we want the result in square meters we simply have to divide the result by 100²
7776cm²/100² = 7776cm² / 10,000
0.7776m²
The actual park has 0.7776 square meters
