What is x in the equation 4x - 12 equals -7x - 111

Mathematics

2 answers:

lukranit [14]3 years ago

5 0

4x - 12 = -7x - 111
11x = -99
x = -9

HACTEHA [7]3 years ago

3 0

Answer:

x = -9

Step-by-step explanation:

I'm sorry, but I won't be explaining it, however I will show every step.

Let's begin.

4x - 12 = -7x - 111

4x - 12 + 7x = -7x - 111 + 7x

11x - 12 = -111

11x - 12 + 111 = -111 + 111

11x + 99 = 0

11x + 99 - 99 = 0 - 99

11x = -99

11x/11 = -99/11

x = -9

You might be interested in

Which angles are pairs of corresponding angles? check all that Apply.

miskamm [114]

Answer:

k i all uc la if u do this now nu will fry ud hedbhedbhgebcyhegfyebc

Step-by-step explanation:

bcyhebvcvbehcbe nhbdwgef che bhcb hsg ge hdbhuj eh

4 0

3 years ago

I've been trying to get an answer for this all day and don't know where to begin what is the answer like I have no clue

Shtirlitz [24]

so, we have two 54x18 rectangles, so their perimeter is simply all those units added together, 54+54+54+54+18+18+18+18 = 288.

we know the circle's diameter is 1.5 times the width, well, the width is 18, so the diameter of the circle must be 1.5*18 = 27.

$\bf \stackrel{\textit{circumference of a circle}}{C=d\pi }~~ \begin{cases} d=diameter\\[-0.5em] \hrulefill\\ d=27 \end{cases}\implies C=27\pi \implies C=\stackrel{\pi =3.14}{84.78} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{perimeter of the rectangles}}{288}~~~~+~~~~\stackrel{\textit{perimeter of the circle}}{84.78}~~~~=~~~~372.78$

6 0

3 years ago

Please help me both a/b!

kozerog [31]

I just wrote it out so hope this helps :)

5 0

3 years ago

A triangular plaque has side lengths of 8 inches, 13 inches, and 15 inches.

lianna [129]

<h3>Answer: A) 52 square inches</h3>

==========================================================

Explanation:

a = 8, b = 13, and c = 15 are the sides of the triangle

s = (a+b+c)/2 = (8+13+15)/2 = 18 is the semi-perimeter, aka half the perimeter.

Those values are then plugged into Heron's Formula below

$A = \sqrt{s*(s-a)*(s-b)*(s-c)}\\\\A = \sqrt{18*(18-8)*(18-13)*(18-15)}\\\\A = \sqrt{18*(10)*(5)*(3)}\\\\A = \sqrt{2700}\\\\A = \sqrt{900*3}\\\\A = \sqrt{900}*\sqrt{3}\\\\A = 30\sqrt{3}\\\\A \approx 51.9615\\\\A \approx 52\\\\$