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Mathematics 9 Online
OpenStudy (anonymous):

At noon, the atmospheric pressure at a weather station was 763 mmHg. At 4 p.m., the atmospheric pressure had changed by 29 mmHg. Which expressions could represent the atmospheric pressure at the weather station at 4 p.m.? Choose two answers that are correct. A. (29 – 763) mmHg B. –(763 + 29) mmHg C. (763 – 29) mmHg D. (763 + 29) mmHg

OpenStudy (anonymous):

. . -

OpenStudy (shadowlegendx):

Oh wait, lol, I actually read the problem

OpenStudy (shadowlegendx):

What do you think the answer is? @TrinCron

OpenStudy (anonymous):

a

OpenStudy (anonymous):

am I wrong

OpenStudy (shadowlegendx):

Two answers, not just one

OpenStudy (anonymous):

c

OpenStudy (shadowlegendx):

A is incorrect, C is correct, what is the other correct answer?

OpenStudy (shadowlegendx):

The value, 763 mmHg , changed. In one case, it went up In another case, it went down You need to find the expressions that basically show how the number increased, and decreased

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