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Mkey [24]
3 years ago
9

-4b - a(-2a + b + 1) +2b(a + 2)​

Mathematics
1 answer:
shepuryov [24]3 years ago
4 0

Answer:

=ba+2a^2-a

Step-by-step explanation:

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Stats help? will mark brainliest!
Gala2k [10]
A. As we observe more numbers, we will always get closer to the actual average. 
5 0
3 years ago
If the radius of the circle is multiplied by a factor of 3, then the area of the circle is multiplied by a factor of
Oksi-84 [34.3K]
\bf \textit{area of a circle}\\\\
A=\pi r^2\quad 
\begin{cases}
r=radius\\
-----\\
r=\stackrel{r\times 3}{3r}
\end{cases}\implies A=\pi (3r)^2
\\\\\\
A=\pi (3^2r^2)\implies A=9(\pi r^2)

notice, if the original area was πr², then the new area has a factor in front of it, that much.
8 0
3 years ago
Write 0.81 as a fraction in simplest from
Kazeer [188]

Answer:

81/100

Step-by-step explanation:

Here's how to convert 0.81 to a fraction...

There is not much that can be done to figure out how to write 0.81 as a fraction, except to literally use what the decimal portion of your number, the .81, means.

Since there are 2 digits in 81, the very last digit is the "100th" decimal place.

So we can just say that .81 is the same as 81/100.

So your final answer is: 0.81 can be written as the fraction 81/100

7 0
3 years ago
4. You sketch a right triangle that has a
stich3 [128]

Answer:

√95 cm

Step-by-step explanation:

To solve, you need to use the pythagorean theorem, or a^2 + b^2 = c^2

The hypotenuse is the c and let one leg be b. You can write:

a^2 + 7^2 = 12^2

a^2 + 49 = 144

Now, you need to solve for a:

a^2 = 144 - 49

a^2 = 95

a = √95 cm, or about 9.75cm

3 0
3 years ago
Read 2 more answers
Safeway is selling a 15 oz. box of Cinnamon Toast Crunch for $3.75. Weis is selling a 20 oz. box of Cinnamon Toast Crunch for $4
d1i1m1o1n [39]

Answer:

You should purchase the cereal at Weis

Step-by-step explanation:

the first options gives a rate of 25 cents per oz. the option that Weis offers is a rate of (0.1875round that up to 19) 19 cents per oz.

7 0
3 years ago
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