Answer:
HCF: 1
LCM: 84
Step-by-step explanation:
7 is a prime number. Nothing but 1 and 7 divide into which means that twelve and 7 have no highest common factor but 1.
The lowest common multiply (because 12 and 7 are prime to each other ) is 12 * 7 = 84
SA = 2πr(r+h)
= 2π7(7+15)
=308pi
The coordinates of point r(-8,0).
<h3>What is midpoint formula in coordinate geometry?</h3>
The coordinates of the point r(x,y) which divides the line segment joining the points p(
,
) and q(
,
) internally in the ratio :
are

Given that,
Two end points on the line q(-14,0) and s(2,0). point r(x,y) is the partition of the line segment from q to s in a ratio 3:5
= 3 and
= 5
By using the midpoint formula




Hence, The coordinates of point r(-8,0).
To learn more about midpoint formula from the given link:
brainly.com/question/4429656
#SPJ4
x + 8x = 9x
(like 1 + 8 but with x's)