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Ivenika [448]
4 years ago
5

What are the solution(s) to the quadratic equation 9x^2=4?

Mathematics
1 answer:
Irina18 [472]4 years ago
8 0

Answer:

x = 2/3 or x = -2/3

Step-by-step explanation:

Solve for x over the real numbers:

9 x^2 = 4

Hint: | Divide both sides by a constant to simplify the equation.

Divide both sides by 9:

x^2 = 4/9

Hint: | Eliminate the exponent on the left-hand side.

Take the square root of both sides:

Answer:x = 2/3 or x = -2/3

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Oksana_A [137]
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3 0
3 years ago
iris spent 2 and 1/2 studying last night she spent 1/5 of the time studying how much time did she spend studying science
tiny-mole [99]

Answer:

30 minutes

Step-by-step explanation:

2 and 1/2 hours is 2 hours and 30 minutes.  If you divide that by 5, then 1/5 of 2 hours and 30 minutes is 30 minutes.

6 0
3 years ago
Can anyone help me with this problem
8_murik_8 [283]
They way I would do it other than with a calculator would be
27 x (90 - 0.5) which is the same as 27 x 89.5
=> 27 x 90 - 27 x 0.5
27 x 90 is (3 x 9) x 90 or 3 x 9 x 90
9 x 90 = 810
3 x 810 = 2430
Then subtract 27 x 0.5, or 27 / 2
2430 - 27 / 2
=> 2430 - 13.5
= 2416.5

Final answer:
2416.5
Hope I helped :)
6 0
3 years ago
What is the answer of -2 < 5 - k ÷ 2
Vera_Pavlovna [14]

Step-by-step explanation:

- 2 < 5 -  \frac{k}{2}  \\  - 7 <  -  \frac{k}{2}  \\  \frac{k}{2}  > 7 \\ k > 14

3 0
3 years ago
The volume of the sphere is StartFraction 500 Over 3 EndFractionπ cubic units.
Schach [20]

Answer: 5 units.

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Volume of a sphere: 4/3 x π x r³

Where r is the radius:

Replacing with the values given:

500/3 π= 4/3 ( π) x³

Solving for x (radius)

500/3 π ÷ 4/3 ( π) = x^3

125 = r^3

∛125 = r

r = 5 units

Feel free to ask for more if needed or if you did not understand something.

7 0
3 years ago
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