The last answer Is wrong it should have a negative slope
we have
---------> equation 
---------> equation 
<u>In the equation clear variable x</u>
----------> equation 
Substitute the equation in the equation
![800*[22.432 -0.012y]+4y=9344](https://tex.z-dn.net/?f=800%2A%5B22.432%20-0.012y%5D%2B4y%3D9344)
![800*[22.432 -0.012y]+4y=9,344\\17,945.6- 9.6y+4y=9,344\\9.6y-4y= 17,945.6-9,344\\ 5.6y=8,601.6\\y=8,601.6/5.6\\y= 1,536](https://tex.z-dn.net/?f=800%2A%5B22.432%20-0.012y%5D%2B4y%3D9%2C344%5C%5C17%2C945.6-%209.6y%2B4y%3D9%2C344%5C%5C9.6y-4y%3D%2017%2C945.6-9%2C344%5C%5C%205.6y%3D8%2C601.6%5C%5Cy%3D8%2C601.6%2F5.6%5C%5Cy%3D%201%2C536)
<u>Find the value of x</u>
therefore
<u>the answer is</u>
Answer:
to sell 7000 it took 10 weeks
it took 3 weeks to sell 210 books
Step-by-step explanation:
Answer:
x=22
Step-by-step explanation:
Reorder the terms:
3(-4 + x) = 2(x + 5)
(-4 * 3 + x * 3) = 2(x + 5)
(-12 + 3x) = 2(x + 5)
Reorder the terms:
-12 + 3x = 2(5 + x)
-12 + 3x = (5 * 2 + x * 2)
-12 + 3x = (10 + 2x)
Solving
-12 + 3x = 10 + 2x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-2x' to each side of the equation.
-12 + 3x + -2x = 10 + 2x + -2x
Combine like terms: 3x + -2x = 1x
-12 + 1x = 10 + 2x + -2x
Combine like terms: 2x + -2x = 0
-12 + 1x = 10 + 0
-12 + 1x = 10
Add '12' to each side of the equation.
-12 + 12 + 1x = 10 + 12
Combine like terms: -12 + 12 = 0
0 + 1x = 10 + 12
1x = 10 + 12
Combine like terms: 10 + 12 = 22
1x = 22
Divide each side by '1'.
x = 22
Simplifying
x = 22
Answer:
4 and 9
Step-by-step explanation:
t2-13t+36=0
factors of 36 are:
1,2,3,4,6,9,12,18,36
factors that add up to 13 are: 9*4
factorise the equation:
(t-9)(t-4)=0
t-9=0 ---> t=9
t-4=0 ---> t=4
