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
nignag [31]
3 years ago
7

F(X)=2x^2 +1 find and simplify:: if f(a) =19 find a. Isn't a just 19??

Mathematics
1 answer:
liberstina [14]3 years ago
5 0
2a^2+1=19\\
2a^2=18\\
a^2=9\\
a=-3 \vee a=3
You might be interested in
Find the value of x that makes the following equation true.<img src="https://tex.z-dn.net/?f=-%204x%20%2B%2026%20%3D%20-2" id="T
azamat

Answer:

Hi! The answer to your question is x = 7

Step-by-step explanation:

☆*: .。..。.:*☆☆*: .。..。.:*☆☆*: .。..。.:*☆☆*: .。..。.:*☆

☆Brainliest is greatly appreciated!☆

Hope this helps!!

- Brooklynn Deka

5 0
3 years ago
Read 2 more answers
2. Sandra plans to swim a total of 2 2/3 miles every week for 2 1/5
Fed [463]

Answer:

5 13/15 miles

Step-by-step explanation:

3 0
3 years ago
Pls help with this question I don't know the answer. Don't put wrong answers pls.
Lapatulllka [165]

Answer:

-2 I believe. because the 1st exponent would make it 9, and then you'd remove 2

Step-by-step explanation:

I hope this is correct and helpful, I tried my best! <3

7 0
3 years ago
PLZ HELP QUICK WILL MARK BRAINLIEST
natima [27]

Answer:

Step-by-step explanation:

12.

the formula for the volume of a cone is V=1/3hπr²

549.5 = 1/3(21)(3.14)(x)^2

549.5 = 7(3.14)(x)^2

549.5 = 21.98(x)^2

549.5 = 21.98(x)^2

divide by 21.98 on both sides

25 = (x)^2

sqrt 25 = sqrt x^2

5 = x

13.

the formula for the volume of a sphere is V=4/3πr^3

v=4/3(3.14)9^3

v=4/3(3.14)729

v=(4.186)729

v=3052.08

14.

the formula for the volume of a sphere is V=4/3πr^3

523=4/3(3.14)r^3

523=4/3(3.14)r^3

523=(4.186)r^3

divide by 4.186 on both sides

124.92=r^3

cube root on both sides

4.998=r

round

5=r

<em><u>Please mark brainliest this took me a while</u></em>

7 0
3 years ago
How many triangles can be constructed with side lengths of 9.6 cm, 11.6 cm, and 21.2 cm?
nignag [31]

Answer:  A) 0 triangles

============================================================

Explanation:

Adding up the two smaller sides gets us 9.6+11.6 = 21.2, but this result is not larger than the third side of 21.2

For a triangle to be possible, we need to be able to add any two sides and have the sum be larger than the third remaining side. This is the triangle inequality theorem.

I recommend you cutting out slips of paper with these side lengths and trying it out yourself. You'll find that a triangle cannot be formed. The 9.6 cm and the 11.6 cm sides will combine to form a straight line that is 21.2 cm, but a triangle won't form.

As another example of a triangle that can't be formed is a triangle with sides of 3 cm, 5 cm, and 8 cm. The 3 and 5 cm sides add to 3+5 = 8 cm, but this does not exceed the third side. The best we can do is form a straight line but that's not a triangle.

In short, zero triangles can be formed with the given side lengths of 9.6 cm, 11.6 cm, and 21.2 cm

3 0
3 years ago
Other questions:
  • harry wants to bake a small cake so he uses 1 cup of sugar based on the recipe how many cups of flour should he use
    13·2 answers
  • Lawanda put $15 of her paycheck into her savings account. Then she spent one-half of what was left on clothes. She paid $24 for
    9·1 answer
  • Simplify the ratio 4:22:30
    7·2 answers
  • Need help with the whole thing
    6·2 answers
  • That the whole question 3 what the answer and what do I do
    11·2 answers
  • math problem: Amanda worked 4.5 hours on Tuesday and 5.2 on Thursday. Her pay rate is $10.50 per hour. How much will Amanda get
    10·1 answer
  • Who else is watching the unas annus livestream<br><br>#Wearehere​
    10·2 answers
  • Please help meeeeeee lol
    13·1 answer
  • jackie made bracelets for 8 days. when he was done he had 96 bracelets. write and equation to express how many bracelets jackie
    15·2 answers
  • Which is a irrational number?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!