How to find the angle measurements of angle AC
1 answer:
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Answer:
48 kg
Step-by-step explanation:
The given relations can be used to write a system of equations for the two weights. Those can be solved to find Jane's weight.
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<h3>setup</h3>Let x and y represent Jane's and Jessica's original weight, respectively. The ratio of weights was ...
x/y = 8/9
After the changes in weight, they were equal:
x+2 = y-4
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<h3>solution</h3>Adding 4 to the second equation, we have an expression for y that can be substituted into the first equation.
y = x +6 . . . . . . . . . . solve the second equation for y
x/(x+6) = 8/9 . . . . . . substitute for y in the first equation
9x = 8(x +6) . . . . . . . multiply by 9(x+6)
x = 48 . . . . . . . . . . . simplify and subtract 8x
Jane weighed 48 kg at first.
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<em>Alternate solution</em>
The original difference in "ratio units" was 9-8 = 1 ratio unit. We find that this corresponds to 6 kg after the weight changes make the weights equal. Then 8 ratio units will be 8(6 kg) = 48 kg—Jane's original weight.
(This mental solution is virtually the same as the solution using equations shown above.)
Answer:
The inequality expression are
Step-by-step explanation:
Given:
Number of hours for babysitting for a week =
Charge for baby sitting = 5$ an hour
Money earned for babysitting in x hours =
Number of hours for cashier for a week =
Charge for Cashier = $10 an hour
Money earned for Cashier in y hours =
He wants to earn at least 70$.
Hence the expression becomes.
Also,
He can’t work any more than 10 hours a week
Hence the expression becomes.
Inequality equation for the given statements are:
The inequality expression are