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Lyrx [107]
4 years ago
11

Help please 30 points

Mathematics
2 answers:
leonid [27]4 years ago
7 0
That's right I think
Solnce55 [7]4 years ago
5 0

Answer:

D 43.5

Step-by-step explanation:

Start with a pile of 17 and 3/4 inches.

Over 3 weeks the stack grows by 25.75 inches.

17.75 + 25.75 = 43.5

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Find the circumference with the given radius.round to the nerest tenth.use 3.14 π r = 7cm​
brilliants [131]

Answer:

44.0 cm.

Step-by-step explanation:

The formula for the circumference of a circle is

C=2\pi r

So we can substitute 7 for r and 3.14 for pi:

C=2(3.14)(7)=43.96 cm

And since we're rounding to the nearest tenth, the answer is 44.0 cm.

6 0
3 years ago
Please help and explain!!!!
KengaRu [80]

Answer:

The expression is: 100 -a - 2b

Step-by-step explanation:

One piece of length a and two pieces of length b, i.e., (2 times b) are a total length of (a + 2b). We are asked to express the remaining part of the wire, originally 100 cm long, so that must be 100 minus the total pieces cut out:

100 - ( a + 2b ) = 100 -a -2b

3 0
3 years ago
If two marbles are selected at random with replacing between draws, what is the probability that the outcome is red then yellow?
saul85 [17]

The probability that the outcome is red then yellow is 0.036.

Given that in a jar there are 8 red marbles, 1 yellow marble and 6 green marbles.

We are required to find the probability of obtaining a red then yelow marble if two marbles are drawn and replacement is used.

Probability is the calculation of finding the chance of happening a event among all the events possible. It lies between 0 and 1.

Probability=Number of items/ Total items.

Number of red marbles=8

Number of yellow marble=1

Number of green marbles=6

Total marbles=15

Probability of obtaining red marble=8/15

Probability of obtaining yellow marble=1/15 (Because replacing is there so the number of total marbles do not decrease)

Required probability=8/15*1/15

=8/225

=0.035555

After rounding off we will get 0.036.

Hence the probability that the outcome is red then yellow is 0.036.

Question is incomplete. The following line should be included in question:

A jar contains 8 red marbles , a yellow marble and 6 green marbles.

Learn more about probability at brainly.com/question/24756209

#SPJ4

8 0
2 years ago
$5.99 for 18 lb this is the question
-Dominant- [34]
Wait- what’s the question.
7 0
3 years ago
Please help meeeeeeee​
lakkis [162]

\\ \rm\Rrightarrow \left(x+\dfrac{1}{x}\right)^2

\\ \rm\Rrightarrow \left(\dfrac{x^2+1}{x}\right)^2\dots(1)

  • .Find x²

\\ \rm\Rrightarrow \left(\dfrac{1}{\sqrt{2}+\sqrt{5}}\right)^2

\\ \rm\Rrightarrow \dfrac{1}{2+2\sqrt{10}+5}

\\ \rm\Rrightarrow \dfrac{1}{2\sqrt{10}+7}

Now put in eq(1)

\\ \rm\Rrightarrow \left(\dfrac{\dfrac{1}{2\sqrt{10}+7}+1}{\dfrac{1}{2\sqrt{10}+7}}\right)^2

\\ \rm\Rrightarrow \left(\dfrac{1+2\sqrt{10}+7}{2\sqrt{10}+7}\times (2\sqrt{10}+7)\right)^2

\\ \rm\Rrightarrow \left(\dfrac{2\sqrt{10}+8}{2\sqrt{10}+7}\times (2\sqrt{10}+7)\right)^2

\\ \rm\Rrightarrow \left(\dfrac{(2\sqrt{10}+8)\cancel{(2\sqrt{10}+7)}}{\cancel{2\sqrt{10}+7}}\right)^2

\\ \rm\Rrightarrow (2\sqrt{10}+8)^2

\\ \rm\Rrightarrow 40+32\sqrt{10}+64

\\ \rm\Rrightarrow 32\sqrt{10}+94

More simplification (If required)

\\ \rm\Rrightarrow 2^52^{\frac{1}{2}}\sqrt{5}+94

\\ \rm\Rrightarrow 2^{5+\frac{1}{2}}\sqrt{5}+94

\\ \rm\Rrightarrow 2^{\frac{11}{2}}\sqrt{5}+94

\\ \rm\Rrightarrow \sqrt{2^{11}}\sqrt{5}+94

\\ \rm\Rrightarrow \sqrt{2048(5)}+94

\\ \rm\Rrightarrow \sqrt{10240}+94

Most accurate

\\ \rm\Rrightarrow 101.19+94

\\ \rm\Rrightarrow 195.19

6 0
3 years ago
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