I'm willing to help you with both parts
Answer:
75
Step-by-step explanation:
Let x be the total points
66/x = 0.88 (88%)
x = 75
Rectangle diagonals are equal.
2(5a+1) = 2(a+1)
10a + 2 = 2a + 2
10a -2a = 2 - 2
8a = 0
⇒ a = 0
AC = 2(5a+1) = 2(5 × 0 +1)= 2(0 + 1) = 2 × 1 = 2 <span>
</span>BD = 2(a+1) = 2(0 + 1) = 2 <span>× 1 = 2
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Ansver: AC = BD = 2