3 years ago

What is the mean of 68,75,72,90,80

Mathematics

1 answer:

andriy [413]3 years ago

5 0

Answer: 77

Step-by-step explanation:

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The circle C has centre A(2,1) and passes through the point B(10,7). Find and equation for C

Semmy [17]

The equation of a circle:
$(x-h)^2+(y-k)^2=r^2$
(h,k) - the coordinates of the centre
r - the radius

$A(2,1) - \hbox{the centre} \\
h=2 \\ k=1 \\ \\
(x-2)^2+(y-1)^2=r^2 \\ \\
\hbox{passes through B(10,7)} \\
x=10 \\
y=7 \\ \\
(10-2)^2+(7-1)^2=r^2 \\
8^2+6^2=r^2 \\
64+36=r^2 \\
r^2=100 \\ \\
\hbox{the equation:} \\ \boxed{(x-2)^2+(y-1)^2=100}$

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3 years ago

-n +(-4) – (-4n) + 6=

Komok [63]

Answer:

3n + 2.

Step-by-step explanation:

Just combine like terms.

4 0

3 years ago

the ages of amit and archana are in ratio of 4:5 if amit age is 4 years 8 month old.find the age of archana

xxTIMURxx [149]

For easier calculation,
convert 4years 8months into months. This would give you 56months.
Amit is 56months old.
4 units/proportion =56
1 unit=56/4
5unit=56/4 ×5(simplify)

7 0

3 years ago

* 2x+50=0 How much is X

tamaranim1 [39]

Answer:

-25

Step-by-step explanation:

2x + 50 = 0

2x = 0 - 50

= -50

x = -50 / 2

= -25