Answer:
Step-by-step explanation:
Area = length * width
length: x + 3
width: x - 5
A = (x + 3)(x - 5)
Simplify (x + 3)(x - 5) using the FOIL method:
1. First numbers: multiply the first number of each binomial together--x*x = x%5E2
2. Outer numbers: multiply the outer number of each binomial (out of the entire expression, the number farthest to the left (x) and the number farthest to the right (-5))--x*-5 = -5x
3. Inner numbers: multiply the inner number of each binomial--3*x = 3x
4. Last numbers: multiply the last number of each binomial--3*-5 = -15
==> Now, add all of the results together and combine like terms: x%5E2+-+5x+%2B+3x+-+15 = x%5E2+-+2x+-+15
Therefore, A = x%5E2+-+2x+-+15
Answer:
mmmmmm it would be 50 but if thats not a awnser on the thingy just pick 51
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
Given
7x + 2 = 16
Subtracting 2 from both sides
7x + 2 - 2 = 16 - 2
7x = 14
Dividing both sides by 7
7x / 7 = 14 /7
x = 2
Hope it will help :)
Set the equation up as a proportion, where x = the height of the tree in feet
27/x = 4.5/5
cross multiply
(4.5)(x) = (27)(5)
(4.5)(x) = 135
divide the entire equation by 4.5 to isolate x
135/4.5 = 30
x = 30
the tree is 30 ft tall
Answer:
Increase by 5% ;
Remain unchanged
Step-by-step explanation:
Given that:
Raise received by all workers = 5%
Since the raise in salary cuts across all employees, then the average or mean salary will also increase by the same amount.
y = m ± c
y = new mean ; m = initial mean ; c = increase
The standard deviation on the other hand isn't affected due to change in a constant value. That is the standard deviation of a. Constant value is Zero. Hence, the standard deviation remains unchanged.