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3 years ago

¿Cuál es el área de un círculo cuya circunferencia mide 7π cm?

Mathematics

1 answer:

Andrej [43]3 years ago

8 0

Answer:

r = 1.4927053303605 cm

C = 9.3789441996695 cm

A = 7 cm²

Step-by-step explanation:

r = radius

C = circumference

A = area

π = pi = 3.1415926535898

√ = square root

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1 year ago

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3 years ago

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3 years ago

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emmasim [6.3K]

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Step-by-step explanation:

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3 years ago

The senior classes at High School A and High School B planned separate trips to Lake Compounce. The senior class at High School

storchak [24]

Answer:

Number of students in vans =15 and bus =46

Step-by-step explanation:

use variables for the vans and buses

let x= vans and y=buses

Now solve the 2 equations simultaneously

remember to number your equations

6x+7y=412..........1

6x+9y=504.........2

make x the subject of one equation

and label it equation 3

6x=412—7y

$x = \frac{206}{3} - \frac{7y}{6} .............3$

subs 3 into 2

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$- 7y + 9y = 504 - 412$

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subs 4 into 1

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$6x + 322 = 412$

$6x = 412 - 322$

$6x = 90$

$x = 15$

Therefore there are 15 students in each van and 46 students in each bus.

3 0

2 years ago