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3 years ago

Which value of a would make the following expression completely factored?

Mathematics

1 answer:

ehidna [41]3 years ago

7 0

Answer:

Step-by-step explanation:

x^2 - a

If a is a perfect square we could factor

x^2 - b^2 = (x-b)(x+b)

So a cannot be 36,49,81 since they are perfect squares

a must be 12

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Maryanne went to lunch with a friend. The bill was $35.60 before tax. Sales tax rate is 7.25%, and she

Stolb23 [73]

Answer:

$43.91

Step-by-step explanation:

Calculating Total Cost. Multiply the cost of an item or service by the sales tax in order to find out the total cost. The equation looks like this: Item or service cost x sales tax (in decimal form) = total sales tax. Add the total sales tax to the Item or service cost to get your total cost.

$35.60 + $2.58 (tax) = $38.18

$38.18+ $5.73 (tip at 15%) = $43.91 total

hope this helps you!

4 0

3 years ago

Approximately how many meters are equal to 11.4 feet?Note: 1 m≈3.3 ftRound your answer to the nearest hundredths.

notka56 [123]

Alright, lets get started.

We are asked, approximately how many meters are equal to 11.4 feet.

We have given that,

3.3 feet = 1 meter

So, 1 feet = $\frac{1}{3.3}$ meter

So, 11.4 feet = $11.4 *\frac{1}{3.3}$ meter

11.4 feet = $\frac{11.4}{3.3}$ meter

11.4 feet = 3.45 meters : Answer

Hope it will help :)

3 0

4 years ago

The data from 200 endothermic reactions involving sodium bicarbonate are summarized as follows: calculate the probability mass f

In-s [12.5K]

Given the table below which contains data from 200 endothemic reactions involving <span>sodium bicarbonate:

$\begin{tabular}
{|c|c|}
Final Temperature Conditions&Number of Reactions\\[1ex]
266 K&48\\
271 K&60\\
274 K&92
\end{tabular}$

We find the probability distribution function as follows:

Let X denote the final temperature, then
</span>
<span> $P(X = 266) = \frac{48}{200} =0.24\\ \\ P(X = 271) = \frac{60}{200} =0.3\\ \\ P(X = 274) = \frac{92}{200} =0.46$ </span>

8 0

3 years ago

Nico Joven presently earns $348.40 per week. He claims

Anika [276]

Answer:

tbh i be wasting m time and ur tiem no kap

Step-by-step explanation:

6 0

3 years ago

An 8-foot by 5-foot section of wall is to be covered by square tiles that measure 4 inches on each side. If the tiles are not cu

ExtremeBDS [4]

Answer:

30 tiles

Step-by-step explanation:

SO we need to find the area of the wall so we do

8 feet * 5 feet = 40 feet squared

then we find that area in inches

40*12=480

Now we find the area of the tiles

4*4=16

So now we divide to find how many tiles are needed

480/16=30

Our answer is 30

6 0

3 years ago