Answer: 29
Step-by-step explanation:
Answer: 29
Step-by-step explanation:
5m-6
5(7)-6
35-6
29
Answer: (-4+ 4√7)/6
Step-by-step explanation:
3x^2+4x-8 =0
Using formula method
-b+
Answer:
x = (-2 ± 2√7) / 3
Step-by-step explanation:
x = [ -b ± √(b² − 4ac) ] / 2a
Here, a = 3, b = 4, and c = -8.
x = [ -4 ± √(4² − 4(3)(-8)) ] / 2(3)
x = [ -4 ± √(16 + 96) ] / 6
x = (-4 ± √112) / 6
x = (-4 ± 4√7) / 6
x = (-2 ± 2√7) / 3
Answer:
Therefore, area of the pond is 48 feet².
Step-by-step explanation:
Since perimeter of a rectangle is represented by 2(length + width)
It has been given in the question perimeter = 28 feet and width = 6 feet.
So perimeter = 2 (l + w )
28 = 2 ( l + 6 )
14 = ( l + 6)
l = 14 - 6 = 8 feet
Now area of the pond = area of rectangle = Length × width
= 6 × 8
= 48 feet²
Therefore, area of the pond is 48 feet².
Answer:
The best option is;
A triangle with three equal sides all longer than 12 inches
Step-by-step explanation:
The cross sectional area of the square prism that passes through points A, B and C is found as follows;
Shape of cross section ABC = Triangle
Base, AB of the triangle is given by;
AB = √(8² + 8²) = √128 = 8·√2
Side, AC of the triangle is given by AC = √(8² + 12²) = 4√13
Therefore, the height of the triangle is given as follows;
Height, h = √(4·√13)²-(4·√2)² = 4·√11
The area of the cross section then is 0.5 × Base × Height
= 0.5 × 8·√2 × 4·√11 = 16·√22
A triangle with 3 equal sides of 8 inches has an area of 4×8×sin(60) = 16√3
A triangle with 2 equal sides of 12 inches and one side of 8 inches has an area of 4×12×sin(60) = 24√3
Therefore since 16·√22 > 24√3 > 16√3, the best option is a triangle with three equal sides of all longer than 12 inches.