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3 years ago

A negative number with an absolute value less than 4.

Mathematics

1 answer:

Mars2501 [29]3 years ago

3 0

Answer:

I think its -4.

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A store sold 650 bicycles last year. this year the store sold 572 bicycles. what is the precent decrease in the number of bicycl

allochka39001 [22]

%change=100(572-650)/650= -12%

The sales decreased by 12%

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3 years ago

Solve the following quadratic by<br> completing the square.<br> y = x^2 - 6x+7

kozerog [31]

Answer:

$x= 3+\sqrt{2}, \quad x= 3 -\sqrt{2}$

Step-by-step explanation:

<u>Given quadratic equation</u>:

$y = x^2 - 6x+7$

To complete the square, begin by adding and subtracting the square of half the coefficient of the term in x:

$\implies y = x^2 - 6x+\left(\dfrac{-6}{2}\right)^2-\left(\dfrac{-6}{2}\right)^2+7$

$\implies y = x^2 - 6x+\left(-3\right)^2-\left(-3\right)^2+7$

$\implies y = x^2 - 6x+9-9+7$

Factor the perfect square trinomial:

$\implies y=(x-3)^2-9+7$

$\implies y=(x-3)^2-2$

To solve the quadratic, set it to zero and solve for x:

$\implies (x-3)^2-2=0$

$\implies (x-3)^2-2+2=0+2$

$\implies (x-3)^2=2$

$\implies \sqrt{(x-3)^2}=\sqrt{2}$

$\implies x-3= \pm\sqrt{2}$

$\implies x-3+3= 3\pm\sqrt{2}$

$\implies x= 3\pm\sqrt{2}$

Therefore, the solution to the given quadratic equation is:

$x= 3+\sqrt{2}, \quad x= 3 -\sqrt{2}$

6 0

1 year ago

Read 2 more answers

A. If the dog house is 8 inches wide on the scale drawing, how wide is the

krok68 [10]

Answer: If the dog can fit in there it’s not a problem u don’t need to know the inches that’s what she said

Step-by-step explanation:

6 0

2 years ago

Six more than x equals 9

Mademuasel [1]

Why do I feel like this isn’t enough info

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3 years ago

If a school wants student opinion on the course registration process, would a systematic sample polling every tenth student to r

777dan777 [17]

Answer:

Stratified random sampling is based on a subdivision of the sample framework into strata with the help of an observable variable that separates them. After forming the strata, each individual is located in one and only one stratum. The sample is established by selecting a certain number of individuals in each stratum, guaranteeing a contribution of each stratum in the information obtained.

The best sampling method, in this case, is Stratified Random.

Step-by-step explanation:

8 0

3 years ago