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Vinil7 [7]
3 years ago
13

1. Sоlvе х^2 = -169.

Mathematics
1 answer:
lys-0071 [83]3 years ago
7 0

Answer:

x=13i, -13i

Step-by-step explanation:

Take the square root of both sides which gives you plus or minus the square root of -169.  Then you get plus or minus 13times the square root of negative 1. Now you can say that x equals positive or negative 13i

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Write the coordinate point for the vertex of this parabola x^2=12y
sergeinik [125]

Answer:

(0,0)

Step-by-step explanation:

the x coordinate for the vertex is at the line of symmetry

ax^2 +bx+c

the line of symmetry is at h =-b/2a

x^2 =12y

divide by 12

1/12 x^2 = y

a = 1/12  b=0 c=0

h = 0/(2* 1/12)

h =0

to find the y coordinate, substitute x=0 back in

y = 1/12 * 0 =  0

the vertex is (0,0)

5 0
3 years ago
Change 21/4 to a mixed number​
8090 [49]

Answer:

5\frac{1}{4}

Step-by-step explanation:

Greatest multiplier of 4 that is less than 21 is 5 (4 x 5 = 20)

Put the remaining number as the numerator (21 - 20 = 1)

3 0
3 years ago
Please help and give explanation
Firlakuza [10]

Answer:

100 mins

Step-by-step explanation:

total no of gallons pool can hold=4500

gallons pool already holds=1500

rate of adding water= 30 gallons per min

time he can continue filing= 4500-1500/30

=3000/30

=100 minutes (m value)

correct me if I'm wrong appreciate me if I'm good

8 0
3 years ago
the diameter of a cylindrical construction pipe is 4 ft. if the pipe is 19 ft long, what s it’s volume?
STALIN [3.7K]

Answer:

76\pi or 238.76 units^{3}

Step-by-step explanation:

The volume of a cylinder is V = \pi r^{2} h

Here the radius is  r = \frac{1}{2} d = \frac{1}{2}(4)=2

The height is given as 19 ft

Then plug in all the numbers into the equation

V = \pi (2^{2})(19) = 76\pi = 238.76 units^{3}

4 0
3 years ago
What is the value of 2/3(x -6) -y , when x= 9 and y=5/6?
ANTONII [103]

Answer:

Ã=7/6

Step-by-step explanation:

<em>2/3(x -6) -y </em>

<h3><em>put the value of x= 9 and y=5/6 </em></h3>

=2/3(9-6)-5/6

=2/3×3-5/6

=2/1-5/6

=12-5/6

=7/6

<em>hey mate hope it's help you</em>......

7 0
2 years ago
Read 2 more answers
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