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1 year ago

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Evaluate the following expression when x=-4 and y=4 x³-x /4y

Formula1" title="\frac{x}{y}" alt="\frac{x}{y}" align="absmiddle" class="latex-formula">

1 answer:

Simora [160]1 year ago

7 0

Answer: - 60

Step-by-step explanation:

$\frac{(-4)^3 - (-4)}{4(4)^-4/4} \\\\= -60$

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Solve for x.<br> Sqrt8 (Sqrt2 - x) = 11

Alexus [3.1K]

Answer: $\frac{-7\sqrt{2} }{4}$

Step-by-step explanation:

So first, let's get rid of the parentheses. We can multiply it out to get $\sqrt{16}-x\sqrt{8} =11$ . We know that the square root of 16 is ±4, so now our equation is ±4 - $x\sqrt{8}$ =11. I'm guessing since the problem only has one solution it's most likely only positive 4, so let's revise our equation to 4 - $x\sqrt{8}$ =11. We can use inverse operations to make the a little easier to solve: -7= $x\sqrt{8}$ . We divide both sides by $\sqrt{8}$ to get $\frac{-7}{\sqrt{8} } =x$ , which we can rationalize (remove the square root from the denominator so that it's a proper answer) by multiplying by $\frac{\sqrt{8} }{\sqrt{8} }$ (which is equal to one so we can use it) which is equal to $\frac{-7\sqrt{8} }{8}$ . Let's finish this by simplifying it. $\sqrt{8} =2\sqrt{2}$ (2x $2^{2}$ ). We can simplify it further by simplifying the 2, making it $\frac{-7\sqrt{2} }{4}$ .

Hope this wasn't too confusing! I'll answer any questions.

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2 years ago

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This is urgent!!!!!!!!!!!!!!!!!!!!

Debora [2.8K]

Answer:

i am not completely sure but i believe the second or third one is the options, sorry i wish i could help more

Step-by-step explanation:

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2 years ago

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A video game sets the points needed to reach the next level based on the function g(x) = 12(2)x − 1, where x is the current leve

EastWind [94]

g(x) = 12(2)x - 1

h(x) = 3x

We are looking for this :

g(6) * h(6) ....so we have....

12(2)6-1 * 36 =

12(2)5 * 729 =

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3 years ago

X+8=17 what is the value of x makes the sentece true

melisa1 [442]

Answer:

x = 9

Step-by-step explanation:

Step 1: Write equation

x + 8 = 17

Step 2: Solve for <em>x</em>

Subtract 8 on both sides: x = 9

Step 3: Check

<em>Plug in x to verify it's a solution.</em>

9 + 8 = 17

17 = 17

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3 years ago

What would be the answer to writing the equations included in the same set of related facts as 6×8=48

larisa [96]

Included in the same facts

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2 years ago