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2 years ago

10

Evaluate 8x-y2-3 when x = -1/4 and y=3plz help

1 answer:

UkoKoshka [18]2 years ago

6 0

Answer:

-14

Step-by-step explanation:

8x-y²-3

8(-1/4) - (3)² - 3

-2 - (9) - 3

= -14

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X^2+6x+8÷x^2-16 simplify

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1 year ago

What property is (x+y)+z=x+(y+z)

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3 years ago

Simplify 4√16 + 8√16

Mumz [18]

$4\sqrt{16} + 8\sqrt{16}$ :

Since $\sqrt{1} =1$ , we get:

$4\cdot \:1\cdot \:6+8\cdot \:1\cdot \:6=24+48=72$

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$7\sqrt{4} *3\sqrt{8}$

We have $\sqrt{4}=2$

simplify $\sqrt{8} = \sqrt{2^3} = \sqrt{2^2*2}$

then the radical rule is used: $\quad \sqrt[n]{ab}=\sqrt[n]{a}\sqrt[n]{b}$

⇒ $\sqrt{2^2*2} = \sqrt{2^2} \sqrt{2}= \sqrt{4}\sqrt{2} =2\sqrt{2}$

Now we have $\sqrt{4}=2$ and $\sqrt{8}=2 \sqrt{2}$

$7\sqrt{4} *3\sqrt{8} = 7*2*3*2\sqrt{2} = 84 \sqrt{2}$

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$2\sqrt{4}+5 \sqrt{9}$

$2\sqrt{4} =2*2= 4$ and $5\sqrt{9} =5*3= 15$

$2\sqrt{4}+5 \sqrt{9} = 4+15 = 19$

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$4\sqrt{5} -2\sqrt{5} = 2\sqrt{5}$

since $2\sqrt{5}$ is the half of $4\sqrt{5}$

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$-4\sqrt{2}\:+\:5\sqrt{2} =1 \sqrt{2} = \sqrt{2}\\$ <em>(-4+5=1)</em>

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2 years ago

What is the value of x? <br><br> 5 sqrt 2<br> 10 sqrt 2<br> 5<br> 10

vitfil [10]

Hey there! :D

So, basically, you could say that "x" is equal to both of the legs.

We also know that in 45-45-90 triangles, x*√2= the hypotenuse

Given this information, if we were to divide 10 by the √2, we would get:

10/√2= 7.071.....

5√2= 7.071....

5√2 is the answer.

I hope this helps!
~kaikers

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3 years ago

A treasure hunter discovered a buried treasure chest filled with a total of 656 gems. 44 of the gems were diamonds, and the rest

UNO [17]

Answer:612

Step-by-step explanation: take 656 and subtract 44 diamonds to get the remaining rubies 656-44= 612

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2 years ago