1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
goldenfox [79]
2 years ago
15

-8-8x^2=-31 how to solve for x

Mathematics
1 answer:
Zepler [3.9K]2 years ago
8 0

Answer:

x = ± \sqrt{\frac{23}{2\sqrt{2}}}

Step-by-step explanation:

-8 - 8x^2= -31

Since this is a quadratic, it needs to be factored.

First, move the x to the other side:

-8 = 8x^2 - 31

Then, get the x alone by first adding 31:

23 = 8x^2

then dividing by 8:

x^2 = 23/8

Finally, square root both sides and remember the even roots property:

x = ± \sqrt{\frac{23}{8}}

and simplify the root 8:

x = ±  \sqrt{\frac{23}{2\sqrt{2}}}

Note: This answer may have a mistake.

You might be interested in
A regular hexagonal prism has an edge length 12 cm, and height 10 cm. Identify the volume of the prism to the nearest tenth.
Alexeev081 [22]

Check the picture below.

so the volume will simply be the area of the hexagonal face times the height.

\textit{area of a regular polygon}\\\\ A=\cfrac{1}{4}ns^2\stackrel{\qquad degrees}{\cot\left( \frac{180}{n} \right)}~~ \begin{cases} n=\stackrel{number~of}{sides}\\ s=\stackrel{length~of}{side}\\[-0.5em] \hrulefill\\ n=6\\ s=12 \end{cases}\implies A=\cfrac{1}{4}(6)(12)^2\cot\left( \frac{180}{6} \right) \\\\\\ A=216\cot(30^o)\implies A=216\sqrt{3} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{area of the hexagon}}{(216\sqrt{3})}~~\stackrel{height}{(10)}\implies 2160\sqrt{3}~~\approx ~~3741.2~cm^3

6 0
1 year ago
"-8 is 12 less than a number."
stiks02 [169]

Answer:

The answer would be x<4

7 0
3 years ago
What is the measure or PHJ
Elina [12.6K]

Answer: The measure of PB and J* not PHJ is Deliciousness.

Step-by-step explanation:

6 0
3 years ago
Describe the graph of y = 3x and compare it with the graph of y = x,
kykrilka [37]

check math  way

Step-by-step explanation: it helps more then here

7 0
3 years ago
A group of health care workers were asked how many times per week they visited a gym. The data is shown on the dot plot. Select
fiasKO [112]

Answer:

the answer is b i think

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • You are fishing and are reeling in a fish. You reel in the fish at a rate of 2.5 feet per second. After 4 seconds, the fish is 1
    11·1 answer
  • Find the average value of f over region
    5·1 answer
  • W-(-3)=18 what is w<br>subtracting intergers
    12·2 answers
  • As part of a school contest, Sarah and Luis are playing a math game. Sarah must pick a number between 1 and 50 and give Luis clu
    5·2 answers
  • A privately owned lake contains two types of game fish, bass and trout. The owner provides two types of food, A and B, for these
    10·1 answer
  • Find the median of this data set <br> {7,2,5,8,14,8,10,2}<br><br> will give brainliest
    7·1 answer
  • There are 230 cal in 4 ounces of a type of ice cream how many calories are in 6 ounces of that ice cream
    10·2 answers
  • Hhhjheeeeeelllpppp mmmeeee
    6·1 answer
  • G(x) =2x-7 find g(5)
    12·1 answer
  • Factor the expression 90+36
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!