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Bad White [126]

3 years ago

15

Luisa had $29.90 in her piggy bank. She made $5.50 a week for 4 weeks by baby-sitting. Write a sequence to show how much money s

he had in her piggy bank after each week.

1 answer:

Temka [501]3 years ago

4 0

Answer:Week 1: $35.40

Week 2: $40.90

Week 3: $46.40

Week 4: $51.90

Step-by-step explanation:

29.90 + 5.50(x) = y

replace x with 1, 2, 3, or 4 for each week.

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kaheart [24]

Answer:

First "order of operations" mistake: step 2

First arithmetic mistake: step 4

Step-by-step explanation:

As we understand Rena's work, she wants to simplify ...

$\left(\dfrac{x^{-3}y^{-2}}{2x^4y^{-4}}\right)^{-3}$

for x = -1 and y = 2.

Her work seems to be ...

<u>Step 1</u>

$\text{Substitute $x=-1$ and $y=2$ into the expression}\\\\\left(\dfrac{(-1)^{-3}2^{-2}}{2(-1)^42^{-4}}\right)^{-3}\qquad\text{no error}$

<u>Step 2</u>

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<u>Step 3</u>

$\text{Evaluate the power to a power}\\\\\dfrac{2^{-6}}{2^{-3}(-1)^{21}}\qquad\text{no error}$

<u>Step 4</u>

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_____

So, the first arithmetic error is in Step 4. However, the order of operations requires exponents be evaluated first. Doing that makes step 2 look like ...

$\left(\dfrac{-\dfrac{1}{4}}{2(1)\dfrac{1}{16}}\right)^{-3}=(-2)^{-3}\qquad\text{proper Step 2}$

__

We expect your answer is supposed to be Step 4.

7 0

4 years ago

Expanded form for 67.943

ratelena [41]

67.943

= 60.000 + 7.000 + 0.900 + 0.040 + 0.003

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4 years ago

Does the table represent an exponential function? Explain.

Ede4ka [16]

Answer:

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Step-by-step explanation:

We have a set of ordered pairs of the form (x, y)

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This means that:

\frac{y_2}{y_1}=\frac{y_3}{y_2}=\frac{y_4}{y_3}=by1y2=y2y3=y3y4=b

This is: y_2=by_1y2=by1

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Observe that:

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3 years ago

Help fastttt please!!!!! When making a pie chart for this data, what percentage of the dresses would the sector label "Blue" inc

lbvjy [14]

Answer:

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Anastasy [175]

the answer is 38.53 becauase it is...

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4 years ago

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