jaydajuliaC
jaydajuliaC jaydajuliaC
  • 18-10-2016
  • Mathematics
contestada

if r = -4 find the value of 3r - 9.

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fromholland fromholland
  • 18-10-2016
3 × -4 -9=-21

you know r so its just fill in
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stellathewiz
stellathewiz stellathewiz
  • 18-10-2016
The answer is -21. You fill in the r with -4 and you multiply 3 with -4 which is -12. Then subtract 9 from -12 which is the same as -12+-9 which is equaled to -21. Hope this helps.
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