Answer:
Electricity bill is 175
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Step-by-step explanation:
Given
monthly
Required
Determine the electricity bill
If each roommate pays 425, then 5 roommates pay 5 * 425
This implies that: the monthly cost of room, gas and electricity add up to 2125.
In other words,
<em>Hence, the electricity bill is 175</em>
Carry out the mult.: f(x) = -[x^2 - 21x + 9x - 189]
Combine like terms: f(x) = -[x^2 - 12x - 189]
Eliminate the brackets [ ]: f(x) = -x^2 + 12x + 189
Identify coefficients a, b and c: a= -1, b=12, c=189
The equation of the axis of symmetry is x = -b/(2a), which here equals
x = -(12)/[2(-1)], or x = 6
This is also the x-coordinate of the vertex. Plug x=6 into the original equation to calculate the y-coordinate.
Answer:
3 / 4
Step-by-step explanation:
We can realize that both the numerator and denominator have a common factor of 9. We can divide them both by 9 to get:
3 / 4
This fraction is in simplest form.
Answer:
5
Step-by-step explanation:
10÷2-3 (5×0)
