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2 years ago

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You need new shoes for work which cost $70. You earn $400 net income each week, but have expenses totaling $380 each week. If yo

u set aside the difference between your weekly income and expenses, how many weeks will it take you to save enough to buy the shoes?

1 answer:

Nadya [2.5K]2 years ago

5 0

Answer:

<u>4 weeks</u>

Step-by-step explanation:

Remaining money (per week) :

Net income - Expenses
$400 - $380
$20

No. of weeks to buy shoes :

Cost of shoes / Remaining money (per week)
$70/$20
3.5 ≈ <u>4 weeks</u> (nearest whole week)

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Both problems give you a function in the second column and the x-values. To find out the values of a through f, you need to plug in those x-values into the function and simplify!

You need to know three exponent rules to simplify these expressions:
1) The negative exponent rule says that when a base has a negative exponent, flip the base onto the other side of the fraction to make it into a positive exponent. For example, $3^{-2} =
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2) Raising a fraction to a power is the same as separately raising the numerator and denominator to that power. For example, $(\frac{3}{4}) ^{3} = \frac{ 3^{3} }{4^{3} }$ .
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</span>

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<span>
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Problem 2
</span>The x-values are in the left column. The title of the right column tells you that the function is $y = (\frac{2}{3})^x$ . The x-values are:
<span>1) x = 0
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<span>
-------

Answers:
a = 1
b = </span> $\frac{1}{16}$ <span>
c = </span> $\frac{1}{256}$
d = 1
e = $\frac{4}{9}$
f = $\frac{16}{81}$

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