Answer:
a(n) = -9 + 7(n - 1) (Answer a)
Step-by-step explanation:
Each new term is found by adding 7 to the previous term. Thus, the formula will include "+ 7." The first term is -9.
The general formula for an arithmetic sequence is a(n) = a(1) = h(n - 1), where h is the "common difference" (which here is 7).
Thus, the desired formula is a(n) = -9 + 7(n - 1) (Answer a)
Given:
Perimeter of the triangle = 99 ft
Length of two sides are 20 ft and 42 ft.
To find:
The length of missing side.
Solution:
Let the missing side be x.
Perimeter of a triangle is the sum of all sides of that triangle.
Subtract 62 from both sides.
Therefore, the missing side of the triangle is 37 ft.
The answer would be D because she owes $300 and each month she pays off $25
Let width be x
Area: 15√2
Diagonal; 4x
First, you need to find the length using pythagorean theorem.
a=x
c=4x
b=?
Solve this in terms of x and you will find the solution to be; √15x²
Knowing this, plug the number back into the area formula to find the value of x,
(x)(√15x²)=15√2
...
..
x⁴=30
Length= √(15√(30))
Do the calculations just to be sure
Hope I helped :)
To solve this problem you must apply the proccedure shown below:
As you can see in the figure attached above, the figure has a semicircle and a rectangle, then, you have that the perimeter is:
P=(18x2)+15+(15/2)(3.14)
P=36+15+23.55
P=74.55
Therefore, as you can see, the answer for this exercise is the last option, the option d, which is: d. 74.55