The mean of 10 numbers is 14 three of the numbers have a mean of 4. The remaining 7 numbers are 15, 18, 21, 5, M, 34 and 14 find: (I) The sum of the remaining 7 numbers,
(ii) the value of m.
please answer ASAP.. please​

21

Step-by-step explanation:

sum of all numbers is 10×14=140

add the 6no=107

sum of3 no is 3×4=12

107+12=119

140-119=21

m=21

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

answer: are you

step-by-step explanation: