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3 years ago

Which is another way of correctly expressing (x - 3)(x - 3)?

Mathematics

2 answers:

Pavlova-9 [17]3 years ago

8 0

Answer:

There are two ways.

1.) The box method

2.) F.o.i.l

Both of these are easy to do, but if you have trouble visualizing things in your head I suggest the box method.

Here is how I did the problem with the box method

worty [1.4K]3 years ago

5 0

(x-3)^2, as x-3 is repeated twice

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ehidna [41]

Answer:

The first graph is misleading because all it is is just bigger. However the second graph is the same 80 million ton barrel twice. This means that its 80 +80 which indeed is 160 million tons.

Step-by-step explanation:

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3 years ago

Andy has a collection of movie DVD's. In Andy's collection 3/5 of the DVD's are action and 1/4 of the DVD's are comedy . Andy sa

valkas [14]

Andy is wrong.
3/5 = 12/20
1/4 = 5/20
Add them up
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3 years ago

Read 2 more answers

What is 7+78/3=?<br> A.43<br> B.25<br> C.25.5<br> D.75

Andrei [34K]

So correct answer is 33

6 0

3 years ago

Suppose a and b are the solutions to the quadratic equation 2x^2-3x-6=0. Find the value of (a+2)(b+2).

KonstantinChe [14]

Answer:

(a+2)(b+2) = 4

Step-by-step explanation:

We are given the following quadratic equation:

$2x^2-3x-6=0$

Let a a and b be the solution of the given quadratic equation.

Solving the equation:

$2x^2-3x-6=0\\\text{Using the quadratic formula}\\\\x = \dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\\\\\text{Comparing the equation to }ax^2 + bx + c = 0\\\text{We have}\\a = 2\\b = -3\\c = -6\\x = \dfrac{3\pm \sqrt{9-4(2)(-6)}}{4} = \dfrac{3\pm \sqrt{57}}{4}\\\\a = \dfrac{3+\sqrt{57}}{4}, b = \dfrac{3-\sqrt{57}}{4}$

We have to find the value of (a+2)(b+2).

Putting the values:

$(a+2)(b+2)\\\\=\bigg(\dfrac{3+\sqrt{57}}{4}+2\bigg)\bigg(\dfrac{3-\sqrt{57}}{4}+2\bigg)\\\\=\bigg(\dfrac{11+\sqrt{57}}{4}\bigg)\bigg(\dfrac{11-\sqrt{57}}{4}\bigg)\\\\=\dfrac{121-57}{156} = \dfrac{64}{16} = 4$

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3 years ago

Prompt Use the applet to select 20 different random samples of 100 part-time college students. For each sample the applet calcul

Ket [755]

Answer:

Yes, we can expect the given result

Step-by-step explanation:

The population proportion P = 0.60

the 95% confidence interval is ( 0.56, 0.76)

The 95% confidence that the true population proportion lies between the interval ( 0.56, 0.76)

Only 5% of 20 random samples i.e only 1 sample is not contain in the population proportion.

6 0

3 years ago