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2 years ago

Help please A. 12 B. 6 C. 2 D. 15

Mathematics

2 answers:

Gre4nikov [31]2 years ago

8 0

Answer:

The answer to this equation would be B. 6!

Step-by-step explanation:

2x + 3 = 15
Subtract 3 from left and right side. Variable needs to be left alone. 15 will turn into 12.
2x = 12
x= 6 since 2 x 6 = 12 or divide 12 by 2 and get 6

Check Answer:

2(6) + 3 = 15

2x6 =12

12 + 3 =15

Oliga [24]2 years ago

6 0

Answer:

Step-by-step explanation:

2x + 3 = 15

- 3 -3

__________

2x = 12

_______

2 2

That cancels out 2x so x = 6

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Hey! Can someone check my answers?

Andrew [12]

The greatest common factor is the biggest number taken from the values.

Q1. The answer is A. 5y^6

$20 y^{9} +5 y^{6}= 4*5 y^{9}+5 y^{6}$
Since $x^{a}* x^{b} =x^{a+b}$ , then $x^{9}= x^{3}* x^{6}$

Back to our expression:
$4*5 y^{9}+5 y^{6}=4*5 y^{3}*y^{6}+5 y^{6}=4 y^{3}*5y ^{6}+ 5y ^{6}*1=5 y^{6} (4y ^{3} +1)$
The greatest common factor is thus $5 y^{6}$

Q2. The answer is D. 12xy^2

$12x y^{5}+60 x^{4} y^{2} -24 x^{3} y^{3}=12x y^{5}+5*12 x^{4} y^{2} -2*12 x^{3} y^{3}$
We will use the rule $x^{a}* x^{b} =x^{a+b}$ to factorise the exponents:
$12x y^{5}+5*12 x^{4} y^{2} -2*12 x^{3} y^{3}= \\ =12x*y^{2}*y^{3}+5*12*x* x^{3} *y^{2}-2*12x* x^{2} *y*y^{2}= \\ =12xy^{2}*y^{3}+12xy^{2}*5 x^{3} -12xy^{2}*2 x^{2} y= \\ =12xy^{2}(y^{3}+5 x^{3}-2 x^{2} y)$
The greatest common factor is thus $12xy^{2}$

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4 years ago

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Verizon [17]

Answer:

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Step-by-step explanation:

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3 years ago

Rafael is taking a test that contains a section of 12 true-false questions. How many of the possible groups of answers to these

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