Answer:
4
Step-by-step explanation:
the geometric mean is 20
the geometric mean of 2 numbers a and b is 
= 
= 20
The answer is a. 40 square centimeters, because the area of a triangle is A=(1/2)Bh, or half of Base multiplied by half of Height.
Answer:
For this case, we have the following equation (according to the comments):
First, we factor the quadratic expression in the denominator:
Then, we multiply both sides of the equation by (a-2) (a + 2):
Later, canceling similar terms we have:
We do distributive property on the left side of the equation:
By grouping variables and constant terms we have:
Rewriting we have:
Finally, by clearing "a" we have:
Note: the value of a is a extraneous solution because it makes the denominator of the original equation equal to zero.
Answer:
the student correct, but the value of a= -2 is an extraneous solution
Answer:
The height of a large block is of 12.1 inches and of a small block is of 7.7 inches.
Step-by-step explanation:
This question is solved using a system of equations.
I am going to say that:
x i the height of a large block.
y is the height of a small block.
Taylor uses 4 large blocks and 2 small blocks to make a tower 63.8 inches tall.
This means that:
Simplifying by 2:
So
Natsumi uses 9 large blocks and 4 small blocks to make a tower 139.8 inches tall.
This means that:
Since
The height of a large block is of 12.1 inches and of a small block is of 7.7 inches.
