OnlyIn1D
Simplify the following expression.
x − 4y + 5z − 3x − y + 2z = ?
2x − 5y + 7z
−2x − 5y − 7z
−2x − 5y + 7z
−2x −5y + 3z
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cwrw238
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add like terms
eg x - 3x = -2x
OnlyIn1D
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huh?
cwrw238
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iits a subtract but u can look upon it as add
x + (-3x) = -2x
xoya
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x − 4y + 5z − 3x − y + 2z
Re-arrange them and then solve
x-3x-4y-y+5z+2z
-2x-5y+7z :)
xoya
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It's option number C :)
OnlyIn1D
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okay thanks
xoya
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Your welcome :)
OnlyIn1D
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@xoya Evaluate: 16 − 10 ÷ 2 + 3
6
8
14
0
OnlyIn1D
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i got 16 is that correct
cwrw238
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the rule here is to work out the division first
then work from left to right
OnlyIn1D
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i mean i got 14 is that correct
cwrw238
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16 - 10 / 2 + 3
= 16 - 5 - 3
= 11 - 3 = 8
cwrw238
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following the following rule
PEDMAS
in order of priority
parentheses, exponent, divide multiply add subtract
OnlyIn1D
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isn't it 16 - 5 +3
cwrw238
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so you see how i did the division first?
OnlyIn1D
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so then 11 + 3
then that will be 14
cwrw238
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oh sorry u r right
yes 14
OnlyIn1D
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Bob's Car Rentals charges a flat rate of $35 per day plus $3.50 per mile. If the number of miles is represented by "m", which algebraic expression represents the overall rate for the day using "m"?
38.50m
35m + 3.50
35 + 3.50m
31.50m
OnlyIn1D
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@xoya
OnlyIn1D
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@cwrw238