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3 years ago

I need this Now (2x + 1)²

Mathematics

2 answers:

Alla [95]3 years ago

7 0

Answer:

4x² + 4x + 1

Step-by-step explanation:

We know that (a + b)² = a² + 2ab + b², therefore, (2x + 1)² = 4x² + 4x + 1.

Angelina_Jolie [31]3 years ago

3 0

Answer:

(2x)^2 + 2(2x)(1) + (1)^2

4x^2 + 4x + 1

Step-by-step explanation:

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A radiator contains 8 quarts of fluid, 40% of which is antifreeze. How much fluid should be drained and replaced with pure antif

ICE Princess25 [194]

Answer:

Step-by-step explanation:

JeanaShupp <- he has the answer thank him

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Answer: 1.6 quarts

Step-by-step explanation:

Given : A radiator contains 8 quarts of fluid, 40% of which is antifreeze.

[40% can be written as 0.40.]

Then, the amount of antifreeze in radiator = (1)

If a radiator contains 8 quarts of fluid with 60% of which is antifreeze.

[60% can be written as 0.60.]

Then, the amount of antifreeze in radiator = (2)

Now subtract (1) from (2) we get,

The amount of fluid should be drained and replaced with pure antifreeze so that the new mixture is 60% antifreeze :-

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2 years ago

How do you factor this math problem? n²+24n+144

Aloiza [94]

The expression $n^2+24n+144$ expands to $(n+12)(n+12)=(n+12)^2$ .

Hope this helps.

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3 years ago

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Add 15, subtract 10 first term 4

romanna [79]

Your answer should be 9 if you start off with 4

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3 years ago

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Let X denote the number of cousins of a randomly selected student. Explain the difference between StartSet Upper X equals 2 EndS

Liono4ka [1.6K]

Answer:

A. (X =4) is the event that the student has four cousins: P(X-4) is the probability of the event that the student has four cousins.

Step-by-step explanation:

An event is an individual outcome or any number of outcomes of a random experiment or trial. An even that contains only one sample point is called a simple event. A compound event contains more than 1 sample point and is formed by the union of simple points.

An event A is said to occur only and if only the outcome of the experiment corresponds to some element of A.

In the given question the first symbolic representation gives an event and the second symbolic representation gives the probability.

The probability of X = 2 or 4 is given by P (X=2) or P (X=4) symbollically.

So A is the best choice.

The relative frequency gives the probability so choice B,C and D are wrong.

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3 years ago

7 1/5 - (-4/5) this is adding and subtracting rationals

tia_tia [17]

8, because the two minuses add up and turn into positive and 1/5 adds to 4/5 and turns into a whole 1 and adds 7 equal 8

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