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
Lapatulllka [165]
3 years ago
9

Solve the inequality

0" id="TexFormula1" title=" 2^{1-x}- 2^{x+2} \ \textless \ 7 " alt=" 2^{1-x}- 2^{x+2} \ \textless \ 7 " align="absmiddle" class="latex-formula">
Mathematics
1 answer:
valkas [14]3 years ago
5 0
Hint: substitute 2^x by say 't': t = 2^x, then you'll have an inequality with a second order polynomial (2/t-4*t<7--> ...). In the end something like t^2 + a*t+b > 0, for some values of a and b, find the roots and get the intervals where it is satisfied.
You might be interested in
Prove that the gregorian calendar repeats itself every 400 years.
Setler79 [48]

The calendar obviously has an integral number of years and months in 400 years. If it has an integral number of weeks, then it will repeat itself after that time. The rules of the calendar eliminate a leap year in 3 out of the four century years, so there are 97 leap years in 400 years. The number of excess days of the week in 400 years can be found by ...

(303·365) mod 7 + (97·366) mod 7 = (2·1 + 6·2) mod 7 = 14 mod 7 = 0

Thus, there are also an integral number of weeks in 400 years.

The first day of the week is the same at the start of every 400-year interval, so the calendar repeats every 400 years.

3 0
3 years ago
Identify the interval that is not equal to the other three 15-19 30-34 40-45 45-49
Lunna [17]

Answer:

45-40

Step-by-step explanation:

The first interval is 15-19.

The width of this interval is: 19-15=4

The second interval is 30-34.

The width of this interval is: 34-30=4

The third interval is 40-45.

The width of this interval is: 45-40=5

The fourth interval is 45-49.

The width of this interval is: 49-45=4

<h3>Therefore the interval that is not equal to the other three is 45-40</h3>
5 0
3 years ago
If u answer this question i will get u famous on brainly
grigory [225]

Answer:

it a

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Kenya exchanges $200 for euros (€). Suppose the conversion rate is €1 = $1.321. How many euros should Kenya receive?
suter [353]
She will get about 151.4 euros when she converts it. 
6 0
3 years ago
Choose the ratio that is equivalent to this one: 9/10<br><br> A) 30/27<br> B) 27/30<br> C) 27/29
Licemer1 [7]

Answer: B

Step-by-step explanation: if you divide 27/30 by 3 you get 9/10

4 0
3 years ago
Read 2 more answers
Other questions:
  • At the museum, the O'Rourke family bought 3 adult tickets and 2 children tickets for $23.50. The Patel family bought 2 adult tic
    14·1 answer
  • Factoring a quadratic with leading coefficient greater than 1 <br><br><br> 2y^2+17y-9
    12·1 answer
  • Factor completely x^8 − 625.
    12·1 answer
  • What do the following two equations represent?
    6·1 answer
  • How many distinct zeroes does the function <img src="https://tex.z-dn.net/?f=f%28x%29%3D%282x%2B1%29%28x%2B1%29%285x-4%29%282x%2
    8·1 answer
  • 3log2(x-1)+log2(4)=5
    10·1 answer
  • GIVNING BRAINLIST
    8·2 answers
  • Use the data set and line plot below. Jerome studied the feather lengths of some adult fox sparrows. How long are the longest fe
    8·1 answer
  • Given two angles that measure 50 degrees and 90 degrees and a side that measures 4 feet​
    15·2 answers
  • What does a cluster tell you about the data on a scatter plot?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!