Well if finding X you get 4,-7 when you simplify the whole equation you get that as well.
Answer:
125-135
Step-by-step explanation:
The standard deviation is 7. This implies that the IQ scorings can be between 123 and 137. With a 90% confidence in these numbers, 125-135 is the closest interval to 90% confidence.
3. We want to solve using properties;
It simply involve trying to reduce numbers to their simpliest form to make multiplication and addition easy without using calculator.
like; 21=20+1, 39=40-1 etc.
4. Given;
A circular plot is watered by a sprinkler that rotates through it. The sprinkler only rotates through a semi-circle, or half of the whole circle.
Area of a circle: A = pi x r^2
r = 160 / 2 = 80
A = pi x 80^2
A = 6400pi / 2 = 3200pi
3200pi = 10053.0965
The area water is approximately 10,053 ft^2.
Hope this helps!! :)
The value of a₃₂ is 7 , Option A is the correct answer.
<h3>What is a Matrix ?</h3>
Matrix is an array or an arrangement of numbers or expression in rows and column format.
The matrix is given
For a matrix of size mxn , m is the row and n is the column of the matrix.
a₃₂ = This term means 3rd row and 2nd column of the matrix
which is 7
Therefore the value of a₃₂ is 7 , Option A is the correct answer.
To know more about Matrix
brainly.com/question/9967572
#SPJ1