Answer:d
Step-by-step explanation:
For this case, the first thing we must do is define a variable.
We have then:
t: number of years
P (t): number of people since 2010
We know that:
1) There were 30,700 people in the city
2) The population is growing at a rate of 850 people per year.
The equation modeling the problem is given by:
Answer:
a formula for the city's population is:
Answer:
C.) 0
Step-by-step explanation:
ax^2+bx+c
discriminant
b^2 -4ac
4^2-4*4*1
16-16
0
Answer:
x = 1/2
, y = 3/2
Step-by-step explanation:
Solve the following system:
{3 y + x = 5
-2 x - 4 = -5
Hint: | Choose an equation and a variable to solve for.
In the second equation, look to solve for x:
{3 y + x = 5
-2 x - 4 = -5
Hint: | Isolate terms with x to the left hand side.
Add 4 to both sides:
{3 y + x = 5
-2 x = -1
Hint: | Solve for x.
Divide both sides by -2:
{3 y + x = 5
x = 1/2
Hint: | Perform a substitution.
Substitute x = 1/2 into the first equation:
{3 y + 1/2 = 5
x = 1/2
Hint: | Choose an equation and a variable to solve for.
In the first equation, look to solve for y:
{3 y + 1/2 = 5
x = 1/2
Hint: | Isolate terms with y to the left hand side.
Subtract 1/2 from both sides:
{3 y = 9/2
x = 1/2
Hint: | Solve for y.
Divide both sides by 3:
{y = 3/2
x = 1/2
Hint: | Sort results.
Collect results in alphabetical order:
Answer:{x = 1/2
, y = 3/2
