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jeka57 [31]
3 years ago
13

At the beginning of the school year, Jamie had $500 in her savings account. She wants to have at least $200 left in the account

at the end of the school year. Each week, she withdraws $30 for spending money. To determine how many weeks she can spend $30, Jamie wrote and solved this inequality.
500 − 30x ≥ 200
−500 −500
−30x ≥ −300
x ≥ 10
Review Jamie’s work. What was her error?
Mathematics
2 answers:
Black_prince [1.1K]3 years ago
8 0

Answer:

Jamie should have reversed the inequality when using the division property of inequality.

Step-by-step explanation:

UNO [17]3 years ago
7 0

Her error was that she misplaced the numbers

-30x ≥ -300

its supose

to be -30x ≥ 200

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4 years ago
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Read 2 more answers
when the square of one number is subtracted from the square of another number, the difference is 1 less than the square of 9. fi
Dmitry_Shevchenko [17]
There's not enough information given to find a definite solution for the two numbers. Instead there will be many solutions. Two variable problems require either a second equation, a value for one of the variables or a relation given between them. (like if they're consecutive integers or one is twice the other)

So, what you can do is write out the equation and "guess and test" till you find two integers that work.

x^2 - y^2 = 9^2 - 1

x^2 - y^2 = 80

y = sqrt( x^2 - 80)

putting in integer values for x starting at 9.

1 = sqrt(81 - 80)
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4 0
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