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4 years ago

How can the expression 3(4x) + 2(7y) be simplified?

Mathematics

2 answers:

Anna007 [38]4 years ago

8 0

The answer is:
12x+14y

Free_Kalibri [48]4 years ago

6 0

So, you can multiply 3(4x) to get 12x and 2(7y) to get 14y and that is it's simplest form. The answer is 12x + 14y .

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What is the length of ac?<br> Someone please answer this fast!

labwork [276]

Answer:

use the laws of sines

Step-by-step explanation:

is you use those you literally good to go .

8 0

3 years ago

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

3 years ago

There are 20 deer per 2 square miles In

sladkih [1.3K]

Answer:

594,250 (a)

Step-by-step explanation:

2 sq. miles = 20 deers

1 sq. mile = 20÷2 = 10

59,425 sq. miles = 59,425×10

= 594,250

8 0

3 years ago

Please help!!!!!!!!!!!!!!!!

vovikov84 [41]

i think that it is the third one

6 0

3 years ago

a shark is 80 feet below the surface of the water. it swims up and jumps out of the water to a height of 15 feet above the surfa

Leni [432]

Answer:

Step-by-step explanation:

80+15 is 75

5 0

3 years ago