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3 years ago

If u could answer this u would be magical

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

8 0

Answer:

12r^2 +r -7

Step-by-step explanation:

9r^2 +4r -7 +3r^2 -3r

Combine like terms

9r^2 +3r^2 +4r -3r -7

12r^2 +r -7

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A length of rope is stretched between the top edge of a building and a stake in the ground. The rope also touches a tree halfway

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The answer is 18 ft because 36 divided by 2 is 18

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3 years ago

2x^2=9-3x <br> Find the factors

d1i1m1o1n [39]

Answer:

x = -3, $\frac{3}{2}$

Step-by-step explanation:

The given quadratic equation is: $2x^2 = 9 - 3x$

This can be written as: $2x^2 + 3x - 9 = 0$

To solve a quadratic equation of the form $ax^2 + bx + c = 0$ we use the formula:

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

Here, a = 2; b = 3; c = - 9

Therefore, the roots of the equation are:

$x = \frac{- 3 \pm \sqrt{9 - 4(2)(-9)}}{2(2)}$

$\implies x = \frac{-3 \pm \sqrt{81}}{4}$

$\implies x = \frac{-3 \pm 9}{4}$

We get two values of 'x', viz.,

x = $\frac{-3 + 9}{4}$ and $\frac{- 3 - 9}{4}$

$\implies x = \frac{6}{4} \hspace{5mm} \& \hspace{5mm} \frac{-12}{4}$

⇒ x = -3, 3/2

Since the factors of the quadratic equation is asked, we write it as:

(x + 3)(x - $\frac{3}{2}$ ) = 0

because, if (x - a)(x - b) are the factors of a quadratic equation, then 'a' and 'b' are its roots.

Multiply (x + 3) and (x - $\frac{3}{2}$ to see that this indeed is the given quadratic equation.

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3 years ago

How do I write 58 2/3 as a decimal

amm1812

Answer: 58.666666666667

Step-by-step explanation:

my brain

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2 years ago

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Scilla [17]

Answer:

i Don't know this but other's can help you.

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3 years ago

Below is a diagram of a box shaped in house that contains a cylindrical air conditioning vental conditioning ventis feet long an

AVprozaik [17]

Answer:

The answer is 30.9 ft

Step-by-step explanation:

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2 years ago

Read 2 more answers