Answer:
y = - 9x + 1
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y-intercept )
here m = - 9, hence
y = - 9x + c ← is the partial equation
To find c substitute (1 , - 8) into the partial equation
- 8 = - 9 + c ⇒ c = - 8 + 9 = 1
y = - 9x + 1 ← equation of line
Answer:
46
Step-by-step explanation:
10%*X=20
X=20/(10%)
X=20/0.1
X=200
23%*200=46
Answer:
(a)
Step-by-step explanation:
and y = 2x - 3
Answer:
x = 8
Step-by-step explanation:
Given
- x = - 8 ( multiply both sides by - 1
- x × - 1 = - 8 × - 1, that is
x = 8
Answer:
Pies=$0.85
Donuts= $1.20
Step-by-step explanation:
In the equation let p stand for the number of pies and d stand for the number of donuts.
To solve this set up 2 equations, one representing bill and the other representing Mary Ann.
- Bill's equation is 5p+7d=$12.65.
- Mary Ann's equation is 6p+6d=$12.30
Then solve using a system of equations. Systems of equations can be solved using elimination or substitution. I will use substitution. Solve bill's equation for p. This gives you 
. Then, you can substitute that into Mary Ann's equation. This looks like 
. Solve for d. Once you solve d=1.20. Finally, substitute 1.20 back into either Bill's or Mary Ann's for d and solve for p. No matter which equation you use p=0.85.
