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zloy xaker [14]

3 years ago

8

you have an initial amount of 55$ in a savings account and you deposit an equal amount into your account each week. After 6 week

s the account holds 133$. Write an equation that represents the amount y (in dollars) of money in the account after x weeks.

1 answer:

sveticcg [70]3 years ago

3 0

55+added=133
added=amount addeed per week times 6=6x

55+6x=133
minus 55 both sides
6x=78
divide both sides by 6
x=13

add 13 per week

y=13x+55

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Answer:

Options (1) and (5)

Step-by-step explanation:

Expression that defines the function is,

$f(x)=\frac{1}{2}x+\frac{3}{2}$

Option 1

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$=-\frac{1}{4}+1+\frac{1}{2}$

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$=1\frac{1}{4}$

So, $f(-\frac{1}{2} )=-2$ is false.

Option 2

f(0) = $\frac{1}{2}(0)+\frac{3}{2}$

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True.

Option 3

f(1) = $\frac{1}{2}(1)+\frac{3}{2}$

= $\frac{3+1}{2}$

= 2

Therefore, f(1) = -1 is false.

Option 4

$f(2)=\frac{1}{2}(2)+\frac{3}{2}$

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$=2\frac{1}{2}$

Therefore, f(2) = 1 is false.

Option 5

f(4) $=\frac{1}{2}(4)+\frac{3}{2}$

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Options (1) and (5) are the correct options.

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3 years ago

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