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3 years ago

What is the sign of -4+-8? Choose 1 answer: Positive Со B Negative Zero

Mathematics

1 answer:

Elodia [21]3 years ago

6 0

Answer:

Negative

Step-by-step explanation:

negative

-4

-8

---

-12

negative

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Can you square root a negative number? Why or why not?

kicyunya [14]

Yes you can because you just can

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3 years ago

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In two or three sentences explain how you would solve for the real solutions of the following equation: please help asap!!

g100num [7]

the real solutions for the equation $x^{3}=-64$ are -

$x=4,2+-2\sqrt{3i}$

Step-by-step explanation:

$x^{3}$ = $- 64$

$x^{3} +64$ = 0

We can write 64 as $4^{3}$

$x^{3}$ + $4^{3}$ = 0

using the identity ( $x^{3}+y^{3} = (x+y)(x^{2} -xy+y^{2} )$ )

we get,

= $(x+4) (x^{2} -x*4+4^{2} )$

= $(x+4)(x^{2} -4x+16)$ ....................(1)

solving the quadratic equation ,

$x^{2} -4x+16$ =0

solutions of this quadratic equation can be obtained by

$x=-b +- \sqrt{b^{2}-4ac } /2a$

let use y for factors

$x=-(-4x)+-\sqrt{(-4x^{2} )-4*x^{2} *16} / 2*x^{2}$

$x=4x+-\sqrt{16x^{2} -64x^{2} } /2x^{2}$

$x=4+-\sqrt{16-64}/2$

$x=4+-4\sqrt{3i} /2$

<u /> $x=2+-2\sqrt{3i}$ ..................(2)

from the equation 1 we have,

$x-4=0$

which gives solution $x=4$

and from equation 2 we got $x=2+-2\sqrt{3i}$

so the real solutions for the equation $x^{3}=-64$ are -

$x=4,2+-2\sqrt{3i}$

3 0

2 years ago

Which number is rational

Irina-Kira [14]

Answer:

36/16

Step-by-step explanation:

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2 years ago

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A chocolate chip cookie recipe asks for three and one half times as much flour as chocolate chips. If one and three quarters cup

Ganezh [65]

3.5 times as much flour as chocolate chips....
f = 3.5c
f = 1 3/4 (or 1.75)

1.75 = 3.5c
1.75 / 3.5 = c
0.5 = c......chocolate chips needed would be 1/2 a cup

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3 years ago

Find the degree of the term.<br> 3x^5

-Dominant- [34]

Answer:

Step-by-step explanation:

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3 years ago