Option 2.
shows the correct way to use the quadratic formula to solve the given equation.
Step-by-step explanation:
Step 1:
For an equation of the form
the solution is
.
Here a is the coefficient of
, b is the coefficient of x and c is the constant term.
can also be written as 
Comparing
with
, we get that a is 1, b is -4 and c is -21.
To get the solution, we substitute the values of a, b, and c in
.
Step 2:
Substituting the values, we get


This is option 2.
Answer:
Her weight is increase by 18 lbs over past five years and the slope is 3.6 lbs per year.
Step-by-step explanation:
Given information: Estelle weight is
At age 16 = 110 lbs
At age 21 = 128 ibs
Increase in her weight over the past 5 years is the difference of weight at age 21 and at age 16.
Increase in her weight over the past 5 years = 128 - 110 = 18
Her weight is increase by 18 lbs over past five years.
Let x=age and y=weight, then the weight function passes through the points (16,110) and (21,128).
If a line passes through two points
and
, then the slope of the line is

Using the above formula we get



Therefore the slope is 3.6 lbs per year.
Answer:
i believe it's 1/3
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
The given shape is a right angled triangle.
Here,
Hypotenuse = 2√3
Another side = √3
Let the missing side length be " x ".
By Hypotenuse theorem,
x² + ( √3 )² = ( 2√3 )²
x² + 3 = 12
x² = 12 - 3
x² = 9
x² = 3²
x = 3
Therefore, the side length is 3.
Answer:
14400 $. do u need an explanation:
so if 6000 is 100 percent
then ??? is 2 percent
to find out that you need to 6000×2 and divide by 2=120$
so you get this monthly.
in ten years you will have 14400 because
10 year=120 month
120month×120$=14400.
btw I cant speak English well. I hope it will help