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2 years ago

Expand fully 6x^2+12x

Mathematics

1 answer:

Alja [10]2 years ago

7 0

Answer:

the answer is 0, i think,

Step-by-step explanation:

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What is the solution for m >7/12

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Answer:

Inequality Form: m > 7/12

Interval Notation: (7/12, ∞)

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2 years ago

Jesssie has a piece of wood that is 8 feet long. He needs to cut pieces that are 7/8 of a foot-long. How many pieces will he be

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8/7.8=

8 x 8/7=

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The answer is 9 pieces

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3 years ago

Deanna gets 3 problems incorrect on a math quiz. Her score is 85%. How many questions are on the quiz?

Vilka [71]

Answer:

20 questions.

Step-by-step explanation:

Let x be the number of questions on the quiz.

85 % means 85 out of 100 (or 85/ 100 )

85/ 100 = 3/x

--->100-85=15

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--->100/5=20

Meaning each question was worth 5% and there were 20 questions.

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3 years ago

Solve for x and y. 4x-3y=16 -2x+4y=-2 DUE 2/7/17!

Trava [24]

$\left \{ {{4x-3y=16\:(I)} \atop {-2x+4y=-2\:(II)}} \right.$

Multiply the 2nd equation by (-4). This will eliminate the x's when you add the two new equations together.
 $\left \{ {{4x-3y=16\:\:\:\:\:\:\:\:\:\:} \atop {-2x+4y=-2\:*(-4)}} \right.$
$\left \{ {{\diagup\!\!\!\!4x-3y=16} \atop {-\diagup\!\!\!\!4x+8y=-4}} \right.$
--------------------
$5y = 12$
$\boxed{\boxed{y = \frac{12}{5}}}\end{array}}\qquad\quad\checkmark$

Let's replace the value found in the first equation:
$4x-3y=16\:(I)$
$4x-3*( \frac{12}{5}) =16$
$4x - \frac{36}{5} = 16$
least common multiple (5)
$\frac{20x}{\diagup\!\!\!\!5} - \frac{36}{\diagup\!\!\!\!5} = \frac{80}{\diagup\!\!\!\!5}$
$20x - 36 = 80$
$20x = 80 + 36$
$20x = 116$
$x = \frac{116}{20} \frac{\div4}{\div4} \to\: \boxed{\boxed{x = \frac{29}{5} }}\end{array}}\qquad\quad\checkmark$

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3 years ago

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2 years ago