Please do all i need help

1. 30 metres

2. 27 squared feet,

3.  25.13 cm

4. 50.27 sqared inches

5. 15.71 metres

6. 380.13 squared metres

7. Area is: 4.52 squared metres Circumference is: 7.54 metres

8. Circumference is: 47.12 feet Area is: 176.71 squared feet

Step-by-step explanation:

1. Since you're rounding pi, your calculation would be:

2 × 3 × 5 = 30

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2. Since you're rounding pi, it would be:

3 × 3² = 27

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3. Use the formula for number 5

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4. Use the formula in number 6

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5. Formula for the circumference of a circle is:

So:

2 × 3.14 × 2.5 = 15.71

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6.  Formula for the area of a circle is:

So:

3.14 × 121 =  380.13

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7. Use the formula for numbers 5 and 6 to figure these out

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8. Use the formula for 5 and 6, except divide the diameter by 2 because the formula only works with the radius

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Have a good day :)

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

i got 10.28 but that rounds up to 10.3