Im not the best at these type of problems please help ;/
1 answer:
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f(x) = - 2(x - )² -
the equation of a quadratic in vertex form is
y = a(x - h)² + k
where (h, k ) are the coordinates of the vertex and a is a multiplier
To obtain this form use the method of completing the square
• the coefficient of the x² term must be 1 , factor out - 2
= - 2(x² - x) - 2
• add / subtract (half the coefficient of the x-term )² to x² - x
= - 2(x² + 2(- )x +
-
) - 2
= - 2(x - )² +
- 2
= - 2(x - )² -
Part 1
<span>Using rounding or compatible numbers, we estimate the product
to
Therefore, the estimate of the product </span><span>, using rounding and compatible numbers is about 15.</span>
Part 2
<span>Using rounding or compatible numbers, we estimate the quotient
to
Therefore, the estimate of the quotient </span><span>, using rounding and compatible numbers is about 9.</span>
Part 3
Given that Mr. Garcia's class ate
pizzas, Mrs Rizzoli's class ate <span>
pizzas,
and Mrs. Tindal's class ate </span><span>
pizzas.
Using benchmarks, we estimate the total number of pizzas eaten by all three classes as follows: </span>
, 
and <span>
Thus, the </span><span>total number of pizzas eaten by all three classes is given by
Therefore, </span>the <span>total number of pizzas eaten by all three classes is about 11.</span>
<span>Using rounding or compatible numbers, we estimate the product
to
Therefore, the estimate of the product </span><span>
Part 2
<span>Using rounding or compatible numbers, we estimate the quotient
to
Therefore, the estimate of the quotient </span><span>
Part 3
Given that Mr. Garcia's class ate
Using benchmarks, we estimate the total number of pizzas eaten by all three classes as follows: </span>
Thus, the </span><span>total number of pizzas eaten by all three classes is given by
Therefore, </span>the <span>total number of pizzas eaten by all three classes is about 11.</span>