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2 years ago

8

Olivia wants to have a 90 average in Algebra, where tests count for 55%, quizzes count for 30%, and HW counts for 15%. If she ha

s a 92 test average and 100% HW average, what must her quiz average be?

1 answer:

nikitadnepr [17]2 years ago

3 0

Uiixhvxjgxufzfubicxguc

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3 years ago

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Rewrite each expression as a polynomial in standard form.a)(x+i)(x-i)b)(x+5i)(x-5i)

Nitella [24]

Answer:

a) x² +1

b) x² +25

Step-by-step explanation:

a) (x+i)(x− i)

= x² - ( i ) x + ( i ) x - ( i)²

= x² - i² ∵ i² = -1

= x² - (-1)

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b) (x+5 i)(x− 5i)

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we can also solve

using identity

(a + b)(a - b) = a² - b²

= (x+5 i)(x− 5i)

= x² - (5 i)²

= x² - 25 i²

= x² +25

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