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3 years ago

Nikki is 5 years older than Jamie. The product of their ages is 126. Which equation could be used to find Nikki’s age, n?

Mathematics

2 answers:

slavikrds [6]3 years ago

7 0

Answer:

126 = n × (n - 5)

Step-by-step explanation:

If Nikki's age is n and she is 5 years older than Jamie, then Jamie is 5 years younger than Nikki's n number of years.

Komok [63]3 years ago

5 0

Answer:

Let, Nikki's age is 'n'.

Since, Jamie is 5 years younger than Nikki, let Jamie's age be 'n-5'

According to the question,

The product of their age is 126.

which means,

Nikki's Age × Jamie's age = 126

⇒ n × (n-5) = 126

⇒ n² - 5n = 126

⇒ n² - 5n - 126 = 0

Now you can do the middleterm,

⇒n² - 14n + 9n - 126 =0

⇒ n ( n - 14 ) + 9 (n - 14 ) = 0

⇒ ( n - 14 ) ( n + 9 ) = 0

since n's value can not negative

⇒ ( n - 14 ) = 0

∴ n = 14

Nikki's age is 14

and Jamie's age is 9 years

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Step-by-step explanation:

Given

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This means that we list out the probability of each value of x.

To do this, we simply subtract the current probability value from the next.

So, we have:

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The calculation is as follows:

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The x values are gotten by considering where the equality sign is in each range.

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This is calculated as:

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$P(4 \le x)=1 - F(4-)$

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$P(4 \le x)=1 - 0.40$

$P(4 \le x)=0.60$

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