3 years ago

PLEASE MAKE SURE HELP MEEEEEEEEEEEEE!

Mathematics

1 answer:

LiRa [457]3 years ago

7 0

Answer:

Step-by-step explanation:

a coefficient is a number with a variable so yea. i also added some pics for it too

you good homie :)

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James can jog twice as fast as he can walk. He was able to jog the first 9 miles to his grandmother’s house, but then he tired a

dimulka [17.4K]

Answer:

6 mile/hour

Explanation :

Let the speed of walking of James = x mile/hour

speed of jogging = 2x mile/hour

9/2x + 1.5/x = 2

= > (9 + 3)/2x = 2

= > 12 = 4x

= > x = 3

Average speed of walking = 3 mile/hour

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This soda can is going to be made from aluminum. How many square centimeters of aluminum are needed if the radius r = 3.5 cm and

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208.81 square centimeters of aluminium are needed

Solution:

Given that,

Radius = 3.5 cm

Height = 6 cm

We have to find the square centimeters of aluminum needed

So we have to find the surface area of cylinder

The surface area of cylinder is given by formula:

$A = 2 \pi r(h+r)$

Where "r" is the radius and "h" is the height of cylinder

Substituting the values we get,

$A = 2 \times 3.14 \times 3.5 \times (6+3.5)\\\\A = 21.98 \times 9.5\\\\A = 208.81$

Thus 208.81 square centimeters of aluminium are needed

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