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Molodets [167]
2 years ago
11

Ted is saving for a toy. He has no money now, but

Mathematics
1 answer:
sweet-ann [11.9K]2 years ago
6 0

Answer:

4D - 1

Step-by-step explanation:

So, if Ted saves $D for 4 weeks, then this amount will be equal to 4D because multiplication is simply repeated addition. We can imagine this situation as D+D+D+D, for the 4 weeks he is saving. We can simplify this to 4D in the expression.

Next, the question tells us that this will be 1 dollar more than needed. So, if we want to find the cost, we need to subtract that dollar.

Thus, the final expression is 4D - 1 because this represents 1 dollar less than the money he saves for 4 weeks.

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Number of weekend minutes used: x
Number of weekday minutes used: y

This month Nick was billed for 643 minutes:
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The charge for these minutes was $35.44
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and $0.08 per minute for calls made on weekdays (y)
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(2) 0.04x+0.08y=35.44

Using the method of substitution
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Replacing x by 643-y in the second equation
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0.04y=9.72

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Answers:
The number of weekends minutes used was 400
The number of weekdays minutes used was 243
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