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3 years ago

15 points!!! Help please

Mathematics

2 answers:

TiliK225 [7]3 years ago

5 0

Answer:

$\frac{1}{5} + (\sqrt{7}$ x $\sqrt{10} )$

Step-by-step explanation:

Both $\sqrt{7}$ and $\sqrt{10}$ will give ± value but when it multiplies it always give a positive number.

Nonamiya [84]3 years ago

4 0

Answer:

Based on this screenshot, this is a Test. Do the test no your own, and if you're unsure what the answer is you can come back to it later or just pick random. If you get it correct or incorrect most tests like this will change their difficulty level to see what types of problems you can and cannot answer. This is so your teacher can see what you know about math and what you may need help learning about.

Step-by-step explanation:

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What is the area of a square with side lengths of 9 feet? 81 ft 81 ft2 36 ft2 36 f

DerKrebs [107]

81ft is the area of square with side lenghts of 9

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3 years ago

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3. A magical four-sided die is rolled twice. Let S be the sum of the resultsof the two rolls. We are told that the probability t

Fed [463]

Answer:

P(S=k) = (1/35)k

8/21

Step-by-step explanation:

P(S=k) is proportional to k

P(S=k) = ck

Total probability is 1

k = 2,3.... 8

Sum of all probabilities =

2c + 3c + 4c + 5c + 6c + 7c + 8c = 1

35c = 1

c = 1/35

P(S=k) = (1/35)k, where k = 2,3,...8

P(1&1):

P(S=2) = 2/35

P(2&2):

P(S=4)/3 = (1/3)(4/35) = 4/105

Because for S=4: (1,3) (2,2) (3,1) and all are equally likely

P(3&3):

P(S=6)/3 = (1/3)(6/35) = 2/35

Because for S=6: (2,4) (3,3) (4,2)

P(4&4):

P(S=8) = 8/35

P(getting doubles = 2/35 + 4/105 + 2/35 + 8/35 = 40/105 = 8/21

6 0

3 years ago

What is 15% of 140 ?

igomit [66]

140 * 0.15 = 21

15% of 140 is 21

6 0

3 years ago

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One positive number is 5 times another number. The difference between the two is 1480.

Stella [2.4K]

Hey there!

Let's create a systems of equations with x and y to find our numbers.

x=5y

x-y=1480

Let's plug our x value into the second equation.

5y=y=1480

4y=1480

y=370

Now we multiply this number by five as the first equation says to get our x.

x=1850

Our numbers are 1850 and 370.

I hope this helps!

4 0

3 years ago

Please answer quickly

olchik [2.2K]

Answer:

a and c I think if I'm wrong I will try again

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2 years ago

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