PQ||SR and PS||QR
a = ?

a = 80°

Solution:

Given data:

PQ || SR and PS || QR

This implies that PQRS is a parallelogram.

PR is a transversal for the parallel lines PQ and SR.

∠SPR and ∠PRQ are alternate interior angles.

If two parallel lines are cut by a transversal, then alternate interior angles are congruent.

∠SPR ≅ ∠PRQ

m∠SPR = m∠PRQ

m∠SPR =  80°

⇒ a = 80°

Hence the measure of a is 80°.

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.