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
ziro4ka [17]
3 years ago
13

Evaluate 2x2 - 1 when x = 3.

Mathematics
2 answers:
Alla [95]3 years ago
6 0

Answer:11

Step-by-step explanation:2(3)x2-1=11

Charra [1.4K]3 years ago
4 0

Hello!

2.x^2 - 1 = 2.3^2 - 1 = 2.9 - 1 = 18-1 = 17

Good luck!

You might be interested in
What's an integer for 300ft above sea level
jeyben [28]
Above is postive. So the answer is +300
3 0
3 years ago
Read 2 more answers
I Need Help With These
Dmitrij [34]
Notice below the picture

the one on the left-hand-side, is the 30-60-90 rule

those are the ratios, for 16), the hypotenuse (slanted side), is 4

for the ratios, that means that 4 = 2x, if you solve that for "x", that simply means "x" is 2

now, just use that value you found for "x" from the hypotenuse ratio, and use it to get the other two sides

what's the perimeter? all three sides added together

for 17)     \bf \textit{area of an equilateral triangle}\\\\
A=\cfrac{s^2\sqrt{3}}{4}\qquad s=\textit{length of one side}

4 0
3 years ago
Y=-5over4x+7 what is the slope pf a line parallel to this line? What is the slope of a line perpendicular?
quester [9]
You question isn't clear, but I assume that you are asking for the slop of a line parallel to y=-(5/4)(x)+7.
The line parallel would have a slop of -5/7 and the line perpendicular would have a slop of 5/7. 
The difference between the two answers is the sign of the two slopes, one is positive the other is negative

4 0
3 years ago
Please help me with this math problem!! Will give brainliest!! :)
8090 [49]

Answer:

A. 17

B. 16

Step-by-step explanation:

F(5)

5 > 2 so you plug the 5 into 3x+2

F(-2)

-5 < -2 < 2 so you plug the -2 into (x-2)^2

7 0
2 years ago
We can use special triangles to solve for x in triangle A<br>true or false​
KIM [24]
I believe the answer is false.

explanation: a special triangle has side lengths of 3-4-5 or 6-8-10. In this case since you have 10 one of the other sides would have to be 6 or 8. You can use pythagorean theorem.
8 0
2 years ago
Other questions:
  • Give a rule for finding the first of four consecutive odd integers if you know the sum of the four integers.
    11·2 answers
  • The tax rate was 6.5. How much would tav be on a 32$ item
    12·1 answer
  • How do I solve this problem? Please help
    11·2 answers
  • Is this a proportional equation? Explain your answer. y=-3/5x
    8·1 answer
  • 4 1<br> __ / ( - __ )<br> 5 15
    13·1 answer
  • What is the fraction of 4.8
    12·2 answers
  • How do I make a box plot
    10·2 answers
  • Tell me yalls playlist‍♀️​
    5·1 answer
  • What is the slope of the line in the graph? <br><br> -4/3<br> -3/4<br> 3/4<br> 4/3
    5·1 answer
  • HELP PLEASE SAVE ME !!!!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!