18 Alexis washes 10 windows in hour At this rate, how many windows can she wash in one hour?

Mathematics

1 answer:

olga2289 [7]2 years ago

8 0

Find 'per hour' here based on the above information.

10 1/2 divided by 3/4

10.5 ÷ 0.75 = 14

<span>14 windows can be washed in one hour is the answer. </span>

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Which of the following constants can be added to x2 + x to form a perfect square trinomial?

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The constant should be added to form a perfect square trinomial will be 1/4. Then the correct option is D.

<h3>What is a quadratic equation?</h3>

It's a polynomial with a value of zero. There exist polynomials of variable power 2, 1, and 0 terms. A quadratic equation is an equation with one statement in which the degree of the parameter is a maximum of 2.

The expression is x² + x.

Then the constant should be added to form a perfect square trinomial.

Then the constant will be

The square of the half of the coefficient of the variable x is to be added to make a perfect square.

Then the constant will be 1/4.

Then the perfect square will be

$\rm \rightarrow x^2 + x + \dfrac{1}{4}\\\\\\\rightarrow x^2 + 2 \times \dfrac{1}{2} x + \left (\dfrac{1}{2} \right )^2\\\\\\\rightarrow \left (x + \dfrac{1}{2} \right)^2$