All categories

3 years ago

I need help finding x! Please show work for both!

Mathematics

2 answers:

Butoxors [25]3 years ago

5 0

Answer:

1. -5

2. -2

Step-by-step explanation:

1. 25-3x=40

-25 -25

-3x=15

/-3 /-3

x=-5

2. 1/3(x-10)=-4

1/3x=-4

x3 x3

x-10=-12

+10 +10

x=-2

Alenkinab [10]3 years ago

4 0

1. Answer x=-5
You would subtract 25 from each side of the equal sign, taking 25 away from 40 and 25 away from 25, isolating the x. So you would then have -3x=15. You would then divide each side by -3, and getting x=-5

You might be interested in

PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!!

Vanyuwa [196]

The radical expression is D

3 0

3 years ago

Read 2 more answers

Solve the following equation by completing the square. 12x^2 - 48x = -39

daser333 [38]

Answer:

$\large\boxed{\boxed{x = \begin{cases} \frac{ \sqrt{3} }{2} + 2 \\ - \frac{ \sqrt{3} }{2} + 2 \end{cases}}}$

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>

quadratic equation
PEMDAS

<h3>let's solve:</h3>

$\sf divide \: both \: sides \: by \: 12 : \\ \sf {x}^{2} - 4x = - \frac{13}{4}$
$\sf \: add \: { - 2}^{2} \: to \: both \: sides : \\ \sf { {x}^{2} } - 4x + ( - {2}^{2} ) = \frac{13}{4} + ( { - 2}^{2} ) \\ {x}^{2} - 4x + 4 = \frac{13}{4} + 4$
$\sf simplify \: addition : \\ \sf { {x}^{2} } - 4x + 4 = \frac{3}{4}$
$\sf use \: {a}^{2} - 2ab + {b}^{2} = (a - b {)}^{2} : \\ \sf (x - 2 {)}^{2} = \frac{3}{4}$
$\sf squre \: root \: both \: sides : \\ \sf \sqrt{(x - 2 {)}^{2} } = \pm \sqrt{ \frac{3}{4} } \\ \begin{cases} x - 2 = \frac{ \sqrt{3} }{2} \\x - 2 = - \frac{ \sqrt{3} }{2} \end{cases}$
$\sf add \: 2 \: to \: both \: sides : \\ \sf \begin{cases}x = \frac{ \sqrt{3} }{2} + 2 \\ x = - \frac{ \sqrt{3} }{2} + 2 \end{cases} \\ \therefore \: x = \begin{cases} \frac{ \sqrt{3} }{2} + 2 \\ - \frac{ \sqrt{3} }{2} + 2 \end{cases}$

7 0

3 years ago

Read 2 more answers

Please help! #15 i know how to solve it i just dont know how to erite the equation out

zhuklara [117]

Here's 2 (almost) equations:
m<1 = m<3
m<1 + m<2 + m<2 + m<3 = 360

I got the first one because angle 1 and 3 are on opposite sides, so they must be equal. I got the second one because 2 and (unlisted) 4 must be equal, and all of the angles added must be 360.

5 0

3 years ago

Read 2 more answers

What are the extremes of the following proportion? 3⁄15 = 12⁄60

pashok25 [27]

<u>Answer:</u>

3 and 60

<u>Step-by-step explanation:</u>

For the given proportions, $\frac { 3 } { 15 } = \frac { 12 } { 60 }$ , 3 and 60 are the extremes while 12 and 15 are the means.