Your electric bill has been as follows for the past six months:
2 answers:
To find the monthly average (mean), add all the numbers up and divide the answer by the total number of numbers you added up.
July: $78.56
August: $30.21
September: $81.20
October: $79.08
November: $66.18
December: $100.75
Add all the bills up.
$78.56 +
$30.21 +
$81.20 +
$79.08 +
$66.18 +
$100.75 =
$435.98
Divide $435.98 by 6 (because you added up 6 numbers).
$435.98 ÷ 6 = $72.66
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Answer:
Given: Quadrilateral P QR S is a rectangle.
To prove :PR= Q S
Construction : Join PR and Q S.
Proof: In Rectangle PQRS, and
→ taking two triangles PSR and Δ QRS
1. PS = Q R
2. ∠ PS R = ∠ Q RS [Each being 90°]
3. S R is common.
→ ΔP SR ≅ Δ Q RS → [Side-Angle-Side Congruency]
∴ PR =Q S [ corresponding part of congruent triangles ]
Hence proved.
