Sign In
Ask Question
Allyson Rios
Mathematics
23 June, 17:20
What is the value of 4r^2-8 when r=3?
+1
Answers (
2
)
Keely Lane
23 June, 17:21
0
28.
Step-by-step explanation:
Put r = - 3 and work it out:
That would be 4 (3) ^2 - 8
= 4 * 9 - 8
= 36 - 8
= 28.
Comment
Complaint
Link
Tyshawn Ferrell
23 June, 17:39
0
28
Step-by-step explanation:
So this means to replace the r you see in 4r^2-8 with 3.
Let's do that:
4 (3) ^2-8
Now to simplify this just use pemdas or a calculator:
4 (9) - 8 since 3^2 means 3*3=9
36-8
28
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Find an answer to your question 👍
“What is the value of 4r^2-8 when r=3? ...”
in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
Penny percent. Suppose you flip a coin 100 times, with 53 tosses landing heads up. What percentage of the tosses would be heads? What percentage would be tails?
Answers (2)
Ou spend half of your money on a movie ticket. Then you spend half of what you have left to buy a large popcorn. Then you spend half of what remains to buy a small drink.
Answers (1)
Write your own word problem that involves 1 1/3 - 2/3. Solve the problem, and explain what your solution means in terms of the problem that you wrote.
Answers (1)
Which is the graph of f (x) = 4 (1/2) ^x
Answers (1)
A bike travels 7 feet in 1/3 of a second. at the same speed, how many feet will it travel in 5 seconds?
Answers (1)
New Questions in Mathematics
Create an equation of the line that has a slope of - 5/7 and crosses the vertical axis at (0,2)
Answers (1)
4. Write the explicit formula that represents the geometric sequence - 2, 8, - 32, 128
Answers (1)
avani is building a rectangular play area the length of the play area is 7.5 meter the width of the play area is 5.3 meters if she wants to cover the area in foam how much foam does she need to buy?
Answers (1)
Factor the expression x^2 - 4x-45
Answers (2)
What is 27/32 divided by 7/8
Answers (2)
Home
»
Mathematics
» What is the value of 4r^2-8 when r=3?
Sign In
Sign Up
Forgot Password?