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3 years ago

What value of B makes the expression. x²+Bx+100 a perfect square trinomial?

Mathematics

1 answer:

matrenka [14]3 years ago

8 0

Answer:

B. 10 is your answer.

Step-by-step explanation:

What you do is you have to look at what you are given and if you times them together it equals 100.

10 x 10 = 100 so...

B. 10 is your answer.

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4 years ago

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3 years ago

The opening balance of one of Jennies 30-day billing cycles for her credit card was $1220, and it remained that amount for the f

natima [27]

Answer:

1) 2.71%

2) $38.32

Step-by-step explanation:

Opening balance = $1220

Balance after 10 days (after expense) = $1690

Balance after 10 days(after payment) = $1340

APR = 33%

1) Periodic interest rate = APR × $\frac{No. of days in a billing cycle}{365}$

= 33%× 30/365

= 2.71%

2) Interest charged for first 10 days = $\frac{1220*2.71*\frac{10}{30} }{100}$

= $11.02

Interst charged for the next 10 days = $\frac{1690*2.71*\frac{10}{30} }{100}$

= $15.2

Interest charged for the next 10 days = $\frac{1340*2.71*\frac{10}{30} }{100}$

= $12.10

Total interest for 30 days = 11.02+15.2+12.10

= $38.32

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