15(100) + 5d+ 20(50) + 7d=d
1500+ 1000+ 12d=d
2500+12d=d
Answer:
Area of triangle= 35
x = 4
Step-by-step explanation:
The formula for area of rectangle = length x width.
Area of triangle = (1/2)bh
It's stated these two areas are equal:
(5)(3x - 5) = (1/2)(x + 3)(10)
Distribute on both the left side and the right side.
15x - 25 = (5)(x + 3)
15x - 25 = 5x + 15
Subtract 5x from both sides and add 25 to both sides.
10x = 40
Divide:
x = 4
Plug this back into the area of triangle:
= (1/2)(x + 3)(10)
= (1/2)(4 + 3)(10)
= (1/2)(7)(10)
= (1/2)(70)
= 35
Answer: 13.7142
Step-by-step explanation: The mean of a data set is equal to the sum of the set of numbers divided by how many numbers are in the set.
So to find the mean of the data set shown here,
let's begin by adding the numbers.
So we have 14 + 18 + 15 + 17 + 5 + 4 + 13 which is equal to 96.
86 will be divided by the number of numbers in the set which is 7.
So, 96 divided by 7 is equal to 13.7142.
So the mean of the data set is 13.7142.
Answer: the answer is B
Step-by-step explanation: