3 years ago

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:

417.4ft^2

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)

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3 years ago

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andrew11 [14]

Answer:

Step-by-step explanation:

For example,

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3 years ago

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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= $\sqrt{225}$

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3 0

3 years ago

Find the squares of (x+3)

d1i1m1o1n [39]

Answer:

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

Step-by-step explanation:

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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
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=13.0952
=13.1 inch^2

7 0

3 years ago

Read 2 more answers