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
rewona [7]
3 years ago
10

Select the assumption necessary to start an indirect proof of the statement. If 3a+7 < 28, then a<7.

Mathematics
1 answer:
pashok25 [27]3 years ago
7 0
When applying indirect proofs, we assume the negation of the conclusion is true, and show that this assumption would lead to nonsense, or contradiction.

In our case we assume a is not smaller than 7, that is we assume a≥7.

a≥7 then, multiplying both sides by 3:
3a≥21, then, adding both sides 7:

3a+7≥28,

which is a contradiction because 3a+7 is smaller than 28.

So our assumption is wrong, which means the opposite of it is correct.


Answer: assume a≥7
You might be interested in
You made two deposits to your bank accounts this month. One deposit was $17.92, and the second deposit was $15.33. Your balance
WITCHER [35]



$72.31  is the total amount AFTER ADDING TWO DEPOSITS

So, if we want to know the amount before deposits, we just need to take the total of previous two deposits

The expressions that show your balance would be

$72.31 – $17.92 – $15.33;    $39.06
6 0
3 years ago
Delia drives 220 km in 2 hours. Calculate her average speed in km/hrs.
alexira [117]
110 because avg speed is total distance over total time
8 0
3 years ago
Can anyone help me ??
bogdanovich [222]
The answer is B 1 =52 2=66
8 0
3 years ago
22/110 to its lowest terms
Dmitrij [34]
Find the GCF, in this case 11, and divide both the numerator and denominator by it. Here, it turns out to be 2/11 because 22÷11 is 2 and 110÷11 is 11.
3 0
3 years ago
Read 2 more answers
Se van a colocar mosaicos de 15m×0.30 m en un espacio que mide 3.2 m2. ¿Cuántos mosaicos completos se colocarán?
kati45 [8]

Answer:

tu aimes les hommes

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • How to convert the equation<br><img src="https://tex.z-dn.net/?f=y%20%3D%20%20%5Cfrac%7Bq%7D%7B5%20%7B%7D%5E%7Bx%7D%20%7D%20" id
    8·1 answer
  • Is a an airplane flies with a constant speed of 500 miles per hour how long will it take to travel a distance of 500 miles
    10·1 answer
  • Jadas family has completed 30% of a trip. They have traveled 15 miles. How far is the trip
    14·2 answers
  • Bradley and Andrew mow lawns to earn spending money. Together they earn $16.50 per hour working for 6 hours. they share their ea
    13·2 answers
  • 24 3/8 inches <br><br> - 12 3/4 inches<br><br> = ?<br><br> Correct gets brainliest
    9·1 answer
  • Write -7/10 as a decimal.
    10·1 answer
  • Re-write the quadratic function below in Standard Form<br> y =4(x + 5)2 – 3
    6·2 answers
  • Help plz I don’t rlly know
    13·1 answer
  • Abercrombie is having a sale of 25% off your purchase. You plan to buy a fleece sweatshirt that has a price tag of $72. How much
    14·1 answer
  • Question 7 of 10 What is the most logical first step in solving the equation x² +10x +25 - 11? A. Subtract 11 from both sides of
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!