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Aleksandr [31]
3 years ago
11

(-7²)×(-2²) is equal to :(a) 14(b) -14(c) 196(d) -196​

Mathematics
2 answers:
quester [9]3 years ago
8 0

Answer and Step-by-step explanation:

(-7²)×(-2²)

49 times 4

(a negative number squared becomes a positive number.

-7 squared is the same thing as -7 times -7, which is 49.

-2 squared is the same thing as -2 times -2, which is 4.

C. 196 is the answer.

     3

     49

  x   4

_____

   196

(40 times 4, + 4 times 9)

( 160 + 36 = 196)

#teamtrees #WAP (Water And Plant)

Ipatiy [6.2K]3 years ago
6 0

Answer:

C

Step-by-step explanation:

-7 x7 = - 49

-2x2= - 4

-49x-4 = 196

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5 0
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Which equation has the solution x = 3?
arsen [322]
Well, let's first solve each equation:

1.) -4x + 6 - 3x = 12 - 2x - 3x

To start, combine each like-term on each side of the equal sign (The numbers with variables in-common // the numbers alike on the same side of the equal sign):

-7x + 6 = 12 - 5x

Now, we get the two terms with variables attached to them, on the same side, so, we do the opposite of subtraction, which is, addition:

-7x + 6 = 12 - 5x
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Next, you do the opposite of addition, which is, subtraction, and, subtract 6 from both sides:

-2x + 6 = 12
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Finally, divide by -2 on each side, to find out what the value of 'x' is:

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So, the answer is not 'A.'
_________________________________________

Now, we test out the rest of the equations, the exact same way:

2.) 4x + 6 + 3x = 12 + 2x + 3x

Combine your like-terms, on each side of the equal sign:

7x + 6 = 12 + 5x

Now, get both terms, with the variable, 'x,' to the same side, and, to do that, do the opposite of addition, which is, subtraction:

7x + 6 = 12 + 5x
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Next, subtract 6 from both sides:

2x + 6 = 12
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Finally, divide by 2, on both sides:

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So, the answer is 'B.'
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3.) 4x + 6 - 3x = 12 - 2x - 3x

Again, we combine the like-terms, on both sides of the equal sign:

x + 6 = 12 - 5x

Now, we get both terms with the variable 'x,' to the same side, and, the opposite of subtraction, is addition, so, we're going to add 5x to both sides:

x + 6 = 12 - 5x
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6x + 6 = 12
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Now, divide by 6, on both sides:

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So, the answer is not 'C.'
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The answer is, 'B.'

I hope this helps!
8 0
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