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goldfiish [28.3K]
3 years ago
9

HELPPPPPPPPP i have the most trouble with math what’s the answer??

Mathematics
1 answer:
lakkis [162]3 years ago
6 0

Answer:

Second Option

\frac{5\sqrt{11} +5\sqrt{3}}{8}

Step-by-step explanation:

To simplify the expression you must multiply the numerator and the denominator of the fraction by the conjugate of the denominator.

If you have an expression of the form

a -b then its conjugate will be a + b.

The result of that multiplication will be

a ^ 2 -b ^ 2

Therefore we have the expression

\frac{5}{\sqrt{11} -\sqrt{3}}

By multiplying by the conjugate of the denominator we have

\frac{5}{\sqrt{11} -\sqrt{3}}*\frac{\sqrt{11} +\sqrt{3}}{\sqrt{11} +\sqrt{3}}\\\\\\\frac{5(\sqrt{11} +\sqrt{3})}{(\sqrt{11})^2 -(\sqrt{3})^2}\\\\\\\frac{5\sqrt{11} +5\sqrt{3}}{11 -3}\\\\\\\frac{5\sqrt{11} +5\sqrt{3}}{8}

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I need help with this :( will mark brainliest
JulsSmile [24]

a. 20 because y is the amount of $$ in account now

b. 12 a $$

c. 260, bc 12*20= 240 240+20=260

6 0
3 years ago
timf 3 số tự nhiên lẻ liên tiếp, biết tích của hai số lớn nhất lớn hơn 6 lần số bé nhất là 177 đơn vị
Murljashka [212]

Answer:

13, 15, 17

Step-by-step explanation:

Gọi 3 STN lẻ cần tìm là a, a+2, a+4 (a thuộc N*)

Theo đề bài ta có:

(a + 2)(a + 4) - 177 = 6a

=> a^2 + 4a + 2a + 8 = 6a + 177

=> a^2 + 6a + 8 = 6a + 177

=> a^2 + 6a - 6a = 177 - 8 (chuyển vế)

=> a^2 = 169 = 13^2

=> a = 13

=> a+2 = 15, a+4 = 17

Vậy 3 STN lẻ cần tìm là 13, 15, 17

7 0
3 years ago
For that middle part I’m soo confused help!
Serjik [45]
F=R G=S H=T
FG≈RS GH≈ST FH≈RT
5 0
3 years ago
Read 2 more answers
1. Find the probability of rolling a sum less than 4 or a
-Dominant- [34]
<h3>Answer:  13/36</h3>

=============================================================

Explanation:

Refer to the chart below. The values in red up top add to the values in blue along the left column to get the 6 by 6 grid of values inside. This represents all of the possible ways to add up values on a pair of dice. There are 6*6 = 36 outcomes.

Of those 36 outcomes, we have 13 outcomes where we roll less than a 4, or greater than 8

  1. outcome = 1+1 = 2
  2. outcome = 1+2 = 3
  3. outcome = 2+1 = 3
  4. outcome = 3+6 = 9
  5. outcome = 4+5 = 9
  6. outcome = 5+4 = 9
  7. outcome = 6+3 = 9
  8. outcome = 4+6 = 10
  9. outcome = 5+5 = 10
  10. outcome = 6+4 = 10
  11. outcome = 5+6 = 11
  12. outcome = 6+5 = 11
  13. outcome = 6+6 = 12

These 13 results are shown in green boxes in the diagram.

Since we have 13 ways to get what we want, out of 36 total, the final answer as a fraction is therefore 13/36

13/36 = 0.3611 = 36.11% approximately

5 0
3 years ago
You need to have at least $100 in your checking account to avoid a low balance fee. You have $247 in your account, and you make
ad-work [718]
Okay, so you need at least $100 in your account to avoid the fee.

You currently have $247.

And you also take out $20, every week.

So first, work out the maximum amount of money you can take out before reaching the limit. (247 - 100 = 147).

Now that we know you can take out $147 max, you just need to divide it by $20, because that's how much you take out every week. (147 ÷ 20 = 7.35 weeks.) But of course, the question is asking for the answer in weeks, so you round the answer down to 7 weeks.

You can last 7 weeks by taking out $20 every week from your $247 balance to avoid the low balance fee. 
3 0
3 years ago
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