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shusha [124]
3 years ago
12

Please help thank you

Mathematics
2 answers:
miskamm [114]3 years ago
4 0
The answer is...Cheeto
Len [333]3 years ago
3 0

Answer:

(-9/2t + 3) + (7/4t + 33) = -11/4t + 36

3(3t - 4) - (2t + 10) = 7t + 22

5(2t + 1) + (-7t + 28) = 3t + 33

(4t + 8/5) - (3 - 4/3t) = 16/3t - 23/5

Step-by-step explanation:

Pair 1:

(-9/2t + 3) + (7/4t + 33)

-11/4t + 3 + 33

-11/4t + 36 is equivalent

Pair 2:

3(3t - 4) - (2t + 10)

9t - 12 - (2t + 10)

9t - 12 - 2t - 10

7t - 12 - 10

7t - 22 is equivalent

Pair 3:

5(2t + 1) + (-7t + 28)

10t + 5 + (-7t + 28)

10t + 5 - 7t + 28

3t + 5 + 28

3t + 33 is equivalent

Pair 4:

(4t + 8/5) - (3 - 4/3t)

4t - 8/5 - 3 - (-4/3t)

4t - 8/5 - 3 + 4/3t

4t - 8/5 - 15/5 + 4/3t

4t - 23/5 + 4/3t

12/3t - 23/5 + 4/3t

16/3t - 23/5 is equivalent

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3 years ago
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garik1379 [7]

(15a^4 - 30a^5 )/5a^2

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4 0
3 years ago
What is the standard deviation of the following data set 1,1.2,4,1.28,4.1,5.3?
VikaD [51]
Memorize the definition of standard deviation: the sd is the square root of the average of the squared deviations of the mean. Wow. Let's do it.

Step 1. First we need the mean. That's easy. Add them up and divide by the count. Check if you get 16.88/5 = 2.81333.

Step 2. Now we're going to subtract this from each of the values, and square the result. Don't worry about negative signs, the squaring will get rid of those. Example for the first number:

(1 - 2.813)^2 = 3.29

The list of numbers I get is (rounded, in reality round as little as possible):

3.29, 2.60, 1.41, 2.35, 1.66, 6.18

Step 3: Add them all up. I get 17.49. 
Step 4: Divide by the count of numbers. 17.49/6 = 2.91
Step 5: Take the square root from this result. SQRT(2.91) = 1.707305

TIP: Use excel to do all these steps, then run the set of numbers through Excel's built-in sd function (called  STDEV.P) and see that you get the same result!
3 0
3 years ago
I don't understand...
Karolina [17]
There both being multiplied by 5
6 0
3 years ago
Read 2 more answers
Help plsss it’s timed i need to passss plsss
Free_Kalibri [48]

Answer:

65°

Step-by-step explanation:

To obtain Angle A, we use the cosine rule ;

Cos A = (b² + c² - a²) / 2bc

Cos A = (12² + 14² - 14²) / 2(12)(14)

Cos A = 144 / 336

A = Cos^-1(144/336)

A = 64.62°

A = 65°

4 0
3 years ago
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