Judi solved the equation 1 – 18 = 43. Her work is shown. What error did Judi make?

Mathematics

2 answers:

sergeinik [125]4 years ago

8 0

Answer:

She should have added 18 to 43 rather than subtracted it.

Step-by-step explanation:

When you are going backwards such as in that problem, you have to do the opposite sign. For example, if it is adding a number, let's say 6, to another number, let's say 4x. So our equation can be 4x + 6 = 18 so I can explain all of the signs.

4x + 6 = 18

- 6 - 6

-----------------

4x = 12

4 times x = 12

/ 4 / 4

x = 3.

I hope this helps for future problems.

mihalych1998 [28]4 years ago

7 0

Answer:

she needed to add instead of subtract to find x so x should be 61

Step-by-step explanation:

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natulia [17]

Y directly proportional to WX and inversely to Z.

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4 years ago

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BARSIC [14]

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Answer:

(d) reflection about the x-axis, up 6 units

Step-by-step explanation:

The parent function y=1/x is multiplied by -1, which reflects it over the x-axis. Then 6 is added, which shifts it up 6 units.

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reflection about the x-axis, up 6 units