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2 years ago

Help a girl out ? i linked the attachment .Thank you smmm have a great day.

Mathematics

1 answer:

SOVA2 [1]2 years ago

3 0

Answer:

The expression that equivalent to $\frac{12x^{4}}{4x^{16}}$ is 3 $x^{4-16}$ ⇒ C

Step-by-step explanation:

Let us revise some rule of exponents

$a^{m}$ × $a^{n}$ = $a^{m+n}$

$\frac{a^{m}}{a^{n}}$ = $a^{m-n}$

$(a^{m})^{n}$ = $a^{mn}$

Let us solve the question

∵ The expression is $\frac{12x^{4}}{4x^{16}}$

→ Simplify the fraction 12/4 first

∵ 12/4 = 3

∴ $\frac{12x^{4}}{4x^{16}}$ = 3 ( $\frac{x^{4}}{x^{16}}$ )

→ By using the second rule above to simplify the variable

∵ $\frac{x^{4}}{x^{16}}$ = $x^{4-16}$

∴ $\frac{12x^{4}}{4x^{16}}$ = 3 $x^{4-16}$

∴ The expression that equivalent to $\frac{12x^{4}}{4x^{16}}$ is 3 $x^{4-16}$

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Simplify -2(-4x + 5)

Bingel [31]

Answer:

the answer would be 8x-10

3 0

2 years ago

A billboard designer has decided that a sign should have 3 ft margins at the top and bottom and 5 ft margins on the left and rig

elixir [45]

Answer:

The width of billboard is "[x]" and the height of billboard is "[y"]. If total area of billboard is $9000 ft^2$ then $9000=xy$

Step-by-step explanation:

• The total width of billboard is [x]. Therefore the width of printed area will be (x-10) by excluding margin of left and right side.

• The total height of billboard is [y]. Therefore the height of printed area will be [(y-6)] by excluding the margin of top and bottom from the total height.

• To find the printed area of billboard calculations are given below:

$& 9000=xy$

$& y=\frac{9000}{x} \\ & A=(x-10)(y-6) \\ & A=xy-6x-10y+60 \\ & A=x\left( \frac{9000}{x} \right)-6x-10\left( \frac{9000}{x} \right)+60 \\ & A=9060-6x-\frac{9000}{x} \\$

On taking the first order derivative of A

$A'=-6+\left( \frac{90000}{{{x}^{2}}} \right)$

$& \left( \frac{90000}{{{x}^{2}}} \right)-6=0 \\ & 6{{x}^{2}}=90000 \\ & x=\sqrt{15000} \\ & y=\frac{9000}{x}=\frac{90000}{\sqrt{15000}}=10\sqrt{150} \\$