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bearhunter [10]
3 years ago
6

For all real numbers a and b, 2a • b = a2 + b2. True or False ? Explain.

Mathematics
2 answers:
vekshin13 years ago
8 0
False. You can pick any two numbers, but not the same number, to show its false. try it

kvv77 [185]3 years ago
5 0
First step of the equation is to simplify the equation 2a • b = a2 + b2 into 2 ab =  a2 + b2. This cannot be factored anymore although. when we try to substitute a with 5 and b with 2, the answer in the right hand side of the equation is -9. hence the answer to this problem is false. we can try another values to verify
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erastovalidia [21]

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4 0
2 years ago
Solve for u. 31.25 = u/5
ipn [44]

Answer:

u = 156.25

Step-by-step explanation:

Step 1: Write equation

31.25 = u/5

Step 2: Solve for <em>u</em>

  1. Multiply both sides by 5: 156.25 = u
  2. Rewrite: u = 156.25

Step 3: Check

<em>Plug in u to verify it's a solution.</em>

31.25 = 156.25/5

31.25 = 31.25

3 0
3 years ago
Read 2 more answers
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Andru [333]
Whats the expression so you can plug those numbers in.
4 0
3 years ago
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Find the value of x.
nevsk [136]

Answer:

<h2>x = 30°</h2>

Step-by-step explanation:

Since the figure above is a triangle, all it's angles sum up to 180°

To find x , add up all the angles and subtract them from 180°

That's

57 + 93 + x = 180

150 + x = 180

x = 180 - 50

We have the final answer as

<h3>x = 30°</h3>

Hope this helps you

5 0
3 years ago
Christina scored a certain number of goals, g, during a soccer season. Sarah scored twice as many goals during the same season.
Norma-Jean [14]
S=2g or y=2x because you are multiplying Christina score by two to get Sarah's score.
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