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Rainbow [258]
3 years ago
15

If 9: x= x4, then x=

Mathematics
1 answer:
Furkat [3]3 years ago
3 0

Answer:

x = ±6

Step-by-step explanation:

9 : x = x : 4

9/x = x/4

Cross multiply.

x² = 9 × 4

x² = 36

x = ±√36

x = ±6

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Find the surface area of a cone with radius 5 ft and height 21 ft substitute pi for 3.14​
Kryger [21]

Answer:

<u>417.4ft^2</u>

Step-by-step explanation:

Surface area of a cone = πr(r+√r²+h²)

r is the radius

h is the height

Substitute

Surface area of a cone = π(5)(5+√5²+21²)

Surface area of a cone = πr(5+√25+441)

Surface area of a cone = π(5)(5+21.59)

Surface area of a cone = 3.14*5*26.59

Surface area of a cone <u>= 417.4ft^2</u>

<u>Hence the surface area of the cone is 417.4ft^2</u>

4 0
3 years ago
Solve for x
andrew11 [14]

Answer:

D

Step-by-step explanation:

For example,

5×7-10>20

5(-3)-10<15

4 0
3 years ago
Find the distance between each pair of points <br>L(-7,0) ,Y(5,9)​
Sedbober [7]

Answer:  The distance is 15

Step-by-step explanation:

To find the distance between L and Y find the difference in the x and y coordinates then square them and add them to find their square root.

-7-5= -12

0-9 = -9

12^2 + 9^2 = d^2   where d is the distance

144 + 81 = d^2

225 = d^2

d= \sqrt{225}  

d= 15

3 0
3 years ago
Find the squares of (x+3)<br>​
d1i1m1o1n [39]

Answer:

{x}^{2}  + 6x + 9 \\

Step-by-step explanation:

{(x + 3)}^{2}  \\ (x + 3)(x + 3) \\ x(x + 3) + 3(x + 3) \\  {x}^{2}  + 3x + 3x + 9 \\  {x}^{2}  + 6x + 9 \\

5 0
3 years ago
Find the area of the sector with a central angle of 60° and a radius of 5 inches. round to the nearest tenth.
slavikrds [6]
Area of sector=thita/360 ×pi×r^2
=60/360×22/7×5×5
=275/21
=13.0952
=13.1 inch^2
7 0
3 years ago
Read 2 more answers
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