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kirill [66]
2 years ago
11

3x^2 + 18x + 27 = 0 can you solve for x

Mathematics
1 answer:
beks73 [17]2 years ago
8 0

Answer:

     3x^2 + 18x + 27 = 0

<=> 3(x^2 + 6x + 9) = 0

<=> 3(x + 3)^2 = 0

<=> x = -3

Hope this helps!

:)

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The number of cars (c) in a parking lot increases when the parking fee (f) decreases.
Vitek1552 [10]

The answer is c maybe?
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Translate The phrase into an algebraic expression.
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10+ 2v .................
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3 years ago
On a coordinate plane, what is the difference between (-2,7) and (-2,-6)?
Shtirlitz [24]
If you mean distance, then we can use the distance formula to find out.

(x - x)² + (y - y)² = d²   Distance formula
(-2 + 2)² + (7 + 6)² = d²   Substitute the points; remember that when you subtract a negative, you add, and also remember to always subtract in the same direction (with the points (1,2) and (3,4), if you do 1 - 3, then do 2 - 4 and not 4 - 2)
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The distance between (-2,7) and (-2,-6) is 13 units.

Hope this helps!
4 0
2 years ago
Carlos is filling a spherical balloon with water. if he increases the volume of the balloon from 4,188.79 cubic centimeters to 1
Harrizon [31]

We know that the volume of a sphere of radius r is given by

V=\frac{4}{3}\pi r^3

Now, we have been given the initial volume was 4,188.79 cubic centimeters. Let us find the radius at this time.

Substituting the value of volume in the above equation, we get

4,188.79=\frac{4}{3}\pi r^3\\&#10;\\&#10;4\pi r^3=4,188.79 \times 3\\&#10;\\&#10;r^3=\frac{4188.79 \times 3}{4\pi}\\&#10;\\&#10;r^3=1000\\&#10;\\&#10;r=10

Now, the final volume is given by 14,137.167 cubic centimeters. Thus, we have

14137.167 =\frac{4}{3}\pi r^3\\&#10;\\&#10;4\pi r^3=14137.167  \times 3\\&#10;\\&#10;r^3=\frac{14137.167\times 3}{4\pi}\\&#10;\\&#10;r^3=3375\\&#10;\\&#10;r=15

Now, let us find the surface areas for these two radii.

For r=10

Surface area is given by

S=4\pi r^2\\&#10;\\&#10;S=4\times 3.14 \times (10)^2\\&#10;\\&#10;S=1256 \text{ square centimeters}

Similarly, for

r=15\\&#10;\\&#10;S=4\times 3.14\times (15)^2\\&#10;\\&#10;S=2826 \text{ square centimeters}

Therefore, the increase in the surface area is given by

\Delta S= 2826-1256= 1570 \text{ square centimeters}

Hence, the average rate at which the surface area is changing is given by

\frac{1570}{12}=130.8

Therefore, the average rate at which the surface area is changing is given by 130.8 square centimeters per second.

7 0
3 years ago
HELP 25 points each!!!!!!!!!!! plzzzzz
Alisiya [41]
4 + 3x = 12
3x = 12 - 4
3x = 8
x = 8/3
x = 2,6 grams
8 0
2 years ago
Read 2 more answers
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