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3 years ago

30909990 expanded form

Mathematics

1 answer:

Aleksandr-060686 [28]3 years ago

7 0

30,909,990

30,000,000 + 900,000 + 9000 + 900 + 90

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Can someone please tell me what I'm doing wrong? I think I know how to do quadratic formula, and I know all the steps, but the l

Nata [24]

Okay, so first you set equal to 0:
$6-6x^{2}=3x\\-6x^{2}-3x+6=0$

Next simplify the equation so that the leading coefficient is positive:
$\frac{-6x^{2}-3x+6}{-3}=\frac{0}{3}\\2x^{2}+x-2=0$

Looking at the quadratic equation you can't easily simplify it, so plug it into the quadratic equation and simplify:
$x=\frac{-b\ -+\ \sqrt{b^{2}-4ac}}{2a}\\\\x=\frac{-(1)\ -+\ \sqrt{(1)^{2}-4(2)(-2)}}{2(2)}\\\\x=\frac{-1\ -+\ \sqrt{1+16}}{4}\\\\x=\frac{-1\ -+\ \sqrt{17}}{4}*\frac{-1}{-1}\\\\x=\frac{1\ -+\ \sqrt{17}}{-4},\ or\ B.$

I noticed a couple mistakes in your work, so if you want me to I can explain them in the comments section :)

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3 years ago

Read 2 more answers

Describe the difference between algebraic expressions and numerical expressions.

Mila [183]

The difference between an algebraic expression and a numerical expression is that algebraic expressions contain numbers and variables. Numerical expressions only contain numbers.

Ex:
Algebraic Expression- 5x+9
Numerical Expression- 4+2

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3 years ago

The model represents an equation.

Pepsi [2]

Answer:

2.25

Step-by-step explanation:

-3x+10=5x-8

+8 +8

-3x+18=5x

+3x +3x

18=8x

_ _

8 8

2.25=x

4 0

3 years ago

Which expression uses the commutative property to make it easier to evaluate

Basile [38]

Let's begin by listing out the given information:

The commutative property states that for addition, the order in which we add numbers does not change their sum & for multiplication, the order in which we multiply does not change their product.

Mathematically expressed as:

$\begin{gathered} x+y+z=y+z+x \\ x\cdot y\cdot z=y\cdot z\cdot x \end{gathered}$

Therefore, the commutative property of this is:

$\begin{gathered} \frac{4}{3}\cdot\frac{1}{5}\cdot18=\frac{4}{3}\cdot18\cdot\frac{1}{5} \\ \Rightarrow\frac{4}{3}\cdot18\cdot\frac{1}{5} \\ \end{gathered}$

Therefore, Option D is the correct answer

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2 years ago

Find the missing values for multiplication equation 7/8

Elza [17]

Simple (Cross multiplication )

7 x
_ _ = 700/8 = 87.5 (100-87.5 = 12.5 is the missing value.

8 100

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3 years ago