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schepotkina [342]
3 years ago
13

Joy and Cullen put some money into their money boxes every week. The amount of money (y), in dollars, in their money boxes after

a certain amount of time (x), in weeks, is shown by the equations below:
Joy: y = 30x + 20
Cullen: y = 20x + 90

After how many weeks will Joy and Cullen have the same amount of money in their money boxes, and what is that amount?



6 weeks, $150
230 weeks, $7
7 weeks, $150
7 weeks, $230
Mathematics
2 answers:
bogdanovich [222]3 years ago
5 0

Answer:

7 weeks, $230

Step-by-step explanation:

i just took the test

Harrizon [31]3 years ago
4 0
The answer would be D. 7 weeks, $230. 

Explanation: y would be the total amount after x weeks. So, to find the answer, simply go through your choices and insert x and y. Both y's for Joy and Cullen have to match up for the answer to be correct. 

For answer D, it looks like: 

Joy: 30(7) + 20 = 230
Cullen: 20(7) + 90 = 230

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