Given the equation - x² + 5x = 3, which can be rewritten as:
- x² + 5x - 3 = 0
where a = -1, b = 5 and c = -3.
Quadratic formula:
Now, we just replace the values of a, b and c on the equation above.
=
Is 27.5 a rational number
1 answer:
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Answer: There were 7 children
Step-by-step explanation:
Let's use <em>x </em>to represent the children and <em>y </em>to represent the adults.
We know they combine to make a group of 25 people so x+y=25
We also know that they paid $201 and that there is $3 per child and $10 for adults so 3x+10y=201
I will solve by substitution.
Solve for y in the first equation
Sub in our value for y into the other equation and solve for x
Step 1) Simplify
Step 2) Subtract 250 from both sides
Step 3) Divide both sides by -7
Answer:
(30) = 4
Step-by-step explanation:
g(x) = 8x -2
Let g(x) = y
y = 8x -2 (note: y is the range and x is the domain, we need to rearrange to make x the range and y the domain instead)
y + 2 = 8x
x = (1/8) (y + 2)
hence the inverse of g(x) is (y) = (1/8) (y + 2)
(30) = (1/8) (30 + 2) = 4