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3 years ago

13

Kelsey has saved $35 towards the cost of A $390 video game in the weeks to come she plans to save in additional $10 per week use

unit analysis to represent them out just saved after W weeks and identify the units for the expression

2 answers:

LenKa [72]3 years ago

3 0

390-35=355

355-10w

355/10=35.5

355-10(35.5)

35 and a 1/2 weeks

36 weeks to have the full amount needed

loris [4]3 years ago

3 0

Answer:

36th weeks

Step-by-step explanation:

Kelsey has saved $35 to buy a video game worth $390.

She plans to save additional $10 per week.

Let w represents number of week.

Let s represents total saving in w weeks.

Addition saving per week = $10

In w weeks saving = 10w

Previous saving amount = $35

Total saving in w week, s = 35 + 10w

Expression which represents total saving in w weeks

s = 35 + 10w

Now find number of weeks to save $390

So, put s=390 and solve for w

35 + 10w = 390

10w = 390 - 35

w = 355÷10

w = 35.5

Hence, Kelsey will save $390 in 36th weeks.

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Answer:

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Step-by-step explanation:

Given <u>rational inequality</u>:

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$\dfrac{(x-1)^2(x-2)^3}{(x-3)^2(x-2)^2(x+5)}\geq 0$

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Create a sign chart, using closed dots for the <u>roots</u> and open dots for the <u>restrictions</u> (see attached).

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Test values: -6, 0, 1.5, 2.5, 4

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Record the results on the sign chart for each region (see attached).

As we need to find the values for which f(x) ≥ 0, shade the appropriate regions (zero or positive) on the sign chart (see attached).

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As interval notation:

$(- \infty,-5) \cup x=1 \cup (2,3) \cup(3,\infty)$

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