Answer:
f=
−2x^2+y
/10x+20
Step-by-step explanation:
Let's solve for f.
y=2x^2+5(x+2)f(2)
Step 1: Flip the equation.
10fx+2x^2+20f=y
Step 2: Add -2x^2 to both sides.
10fx+2x^2+20f+−2x^2=y+−2x^2
10fx+20f=−2x^2+y
Step 3: Factor out variable f.
f(10x+20)=−2x^2+y
Step 4: Divide both sides by 10x+20.
f(10x+20)
/
10x+20
=
−2x2+y
10x+20
Answer:
Step-by-step explanation:
The rule to know and follow is:
You can add, subtract, multiply or divide by anything so long as the same thing is done to both sides of the equals sign;
5a + b = 14
If we want to get: "a = ...", then we use the rule to isolate the variable a on one side of the equation;
Firstly, we subtract b from both sides:
5a + b - b = 14 - b
5a = 14 - b
Then, divide both sides by 5:
Answer:
Step-by-step explanation:
Find the difference between the 2 points.
For example, (8, 9) (5, 3).
Compare the difference between the x's, in this case 8 and 5. The difference is 3. Do the same with the y's, 9 and 3. The difference is 6.
To find the slope, it's y/x. The slope in this situation is 6/3. Simplify. The slope is 2.
To find the y-intercept, insert the slope and one of the 2 points in the beginning into y = mx + b & solve for b.
For example, if we use the ordered pair (5, 3) the equation would look like:
3 = 2(5) + b, Solve for b.
Multiply. 3 = 10 + b
Get b by itself by adding - 10 to both sides.
-7 = b
The y-intercept is -7. So, in this case, the equation is y = 2x - 7.
