Length=x
width = x+7
Area =length* width =x(x+7)=170
x^2+7x=170
x^2+7x-170=0
Answer:
9 days
Step-by-step explanation:
Since the secret spread at a geometric rate we will use the geometric progression formulae
ar^n-1
First term = a= 5
common ratio is 2
For the nth term
5*2^n-1 = 1280 divide both sides of the equation with 5
2^n-1 = 256
2^n-1= 2^8
n-1 =8
n = 8+1
n=9
All the children will know the secret in 9 days
Alternatively
2nd day= 5*2^2-1
5*2^1=
5*2= 10
3rd day = 20
4th day= 40
5th day= 80
6th day = 160
7th day = 320
8th day =640
9th day =1280 children
we are given a regular triangular pyramid with a slant height of 9 m and volume of 50 m3. We can get the altitude of the pyramid by sin 60 = h / 9; h is equal to 7.7942 m. Volume is equal to 1/3 h * B, B is equal to 19.2451 m2. perimeter of the base is 3*9 m equal to 27 meters. The lateral area has a formula of 1/2 pl, substituting, lateral area is equal to 121.5 m2.
Hi! Let me help you!
Before I answer your question, I should first introduce you to triangles! There ae three triangles: Isosceles triangle, equilateral triangle, and scalene triangle. If I remember it right, isosceles triangles have at least one line of symmetry; an equilater triangle must have three lines of symmetry; a scalene triangle HAS NO line of symmetry.
Now, to answer your question: the answer is FALSE. Scalene triangles have no line of symmetry.
I hope this helped you!
Step-by-step explanation:
200
thanks for the free points!
have a great day!
