Answer:
20
Step-by-step explanation:
Answer:
Width of the room = 5 meters
Step-by-step explanation:
the rectangular living room is calculated as length * width
The area is given to be equal to 40 sq. meters (area = 40 sq. meters)
Let the width = x meters
Length = X+3 meters
Area = Length * Width
40 = X * (X+3)
40 = X^2 + 3X
We solve this quadratic equation
So x = 5 or x= -8
Width cannot be negative, so we reject x =-8
So x = 5 is the answer
Answer:
Step-by-step explanation:
Given: 10 less than 
is 35.
To find: The equation of the given situation.
Solution: We need to write an equation for 10 less than is 35.
Here, we will break down the sentence to form the equation.
10 less than means 
.
Then, it says 10 less than is 35 which means it is equal to 35.
So, the sentence 10 less than is 35 can be written as 10 less than is equal to 35.
Now, 10 less than is equal to 35 can be shown as .
Therefore, the required equation is .
Step-by-step explanation:
the formula for the sum of the first n terms of a geometric sequence is
Sn = s1(1 - r^n)/(1 - r)
with r being the common ratio and s1 is the first term.
so,
S15 = 7×(1 - (-3)¹⁵)/(1 - -3) = 7×(1 - -14,348,907)/4 =
= 7×14,348,908/4 = 7×3,587,227 = 25,110,589
