3 squared square root x minus 12 equals negative two

If the length of room is four times the height and breadth is twice of its height and the volume of the room is 512 m^2 find its

lisov135 [29]

$Let \: x \: (x>0) \: be \: the \: height \Rightarrow the \: width, length: 2x,4x \\ Volume:V=hwl = 512 \\ \Leftrightarrow x2x4x = 512 \\ \Leftrightarrow 8{x }^{3} = 512 \\\Leftrightarrow {x}^{3} = 64 \\ \Leftrightarrow x = 4 \\ \Rightarrow The \: height \: is \: 4 \: m, the \: width \: is \: 8 \: m$

8 0

4 years ago

Tina planted a tree that was 6 feet tall and grew 3 feet every year her neighbor planted a tree from a seed but it grew 6 feet e

Iteru [2.4K]

2 years

Tina planted a tree. It started at 6 feet and every year it grows another three feet. The expression representing this is 6 + 3x, where x represents years.

Tinas neighbor also planted a tree where each year (which we called x) it grows 6 feet. The expression to represent this is 6x.

If you want to know when they’ll be the same height, then you need to set the expressions equal to each other.

6 + 3x = 6x

To solve, first get the variable to one side

6 = 3x

Divide each side by 3

x = 2

The trees wi be the same height the 2nd year.

6 0

3 years ago

Read 2 more answers

Expand.<br> Your answer should be a polynomial in standard form.<br> (9+ m)(-m +9)=

valina [46]

Answer: -1m²+81

Step-by-step explanation:

correct standard form means that the terms are ordered from biggest exponent to lowest exponent.The leading coefficient is the coefficient

of the first term in a polynomial in standard form.

FoR example, (9+ m) (-m+9) = *(m+9) (-m+9) *m(-m+9) +9 (-m+9)* -1.mm+9m +9(-m+9) * -1m² +9m +9(-m+9) *-1m²+9m- 9m +81

answer -1m²+81

6 0