The circumference of the circle
is given by the equation C = pi * D. Incorporating the length of the diameter
into the equation, we have,
C = pi * D
C =
pi * 7cm
C =
21.99 cm
Answer:
y = 3
Step-by-step explanation:
2y - 3 = 
square both sides to remove sqrt bracket
(2y - 3)^2 = (
)^2
simplify both sides
(2y - 3)(2y - 3) =
- 10y + 12
- 12y + 9 =
- 10y + 12
bring all value to left side
- 2y - 3 = 0
factor
(y - 3)(y + 1)
solve for y
y = 3, y = -1
When plugged back into the equation, only y = 3 is true
Answer:
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Step-by-step explanation:
<3
<span>2r + 3s= 9 <=> -6r -9s = -27;</span>
<span>3r + 2s= 12 <=> 6r + 4s = 24;
=> 0*r -5*s = -3 => s = 3/5;
2*r + 3*(3/5) = 9<=> 10*r + 9 = 45 <=> 10*r = 36 => r = 18/5;
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