Answer:
Step-by-step explanation:
(9 + m)(-m + 9) = (9 + m)(9 - m) {(a+b)(a-b) = a² - b²}
= 9² - m²
= 81 - m²
= -m² + 81
Answer:
o
Step-by-step explanation:
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20 + 5 + 2 + 3 + 1 minus 1 =30
Answer:
26.88
Step-by-step explanation:
20%*22.40=4.48
22.40+4.48=26.88
