2 years ago

Find x if:

Mathematics

1 answer:

lakkis [162]2 years ago

8 0

Answer:

Step-by-step explanation:

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Evaluate the following expression using the values given:

MakcuM [25]

Answer:

Step-by-step explanation:

-3a²-b³+3c²-2b³
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How many times can 14 go into 61

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14 can go into 61 only 4 times!

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3 years ago

Find the solution set of the following quadratic equations using the quadratic formula.

oksian1 [2.3K]

Answer:

<h3> 1) $x_1=\dfrac{7+\sqrt{13}}2\,,\quad x_2=\dfrac{7-\sqrt{13}}2$ </h3><h3> 2) $x_1=-\dfrac13\,,\quad x_2=-3$ </h3>

Step-by-step explanation:

$x^2 - 7x + 9 = 0\quad\implies\quad a=1\,,\ b = -7\,,\ c=9\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}=\dfrac{-(-7)\pm\sqrt{(-7)^2-4\cdot1\cdot9}}{2\cdot1}=\dfrac{7\pm\sqrt{49-36}}2\\\\x_1=\dfrac{7+\sqrt{13}}2\,,\quad x_2=\dfrac{7-\sqrt{13}}2$

<h3>2)</h3><h3> $3x^2 + 10x=-3\\\\3x^2+10x+3=0\quad\implies\quad a=3\,,\ b =10\,,\ c=3\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}=\dfrac{-10\pm\sqrt{10^2-4\cdot3\cdot3}}{2\cdot3}= \dfrac{-10\pm\sqrt{100-36}}6\\\\x_1=\dfrac{-10+\sqrt{64}}6=\dfrac{-10+8}6=-\dfrac13\,,\qquad x_2=\dfrac{-10-8}6=-3$ </h3>

7 0

3 years ago

What is the surface area of a rectangular prism with the dimensions of: Length is 5.5, Width, 4, and Height, 3.8

babymother [125]

Answer:

Total Area = height * width + height * length + width * length

Total Area = 3.8 * 4 + 3.8 * 5.5 + 4 * 5.5 =

15.2 + 20.9 + 22 =

58.1 square units

Step-by-step explanation:

7 0

4 years ago