Mathematics 3a
help with mathematics please?
3-(2t+5)= -12
5a – 15 + 9a= 3a + 29
y- 7> 3+ 2y
15 + 6n < -33
(-15) to the power of 2
CAN YOU PLEASE HELP ME WITH THESE FEW ALGEBRA QUESTIONS PLEASE AND THANK YOU (:
3-(2t+5) = -12
3 – 2t – 5 = -12
-2t – 2 = -12
-2t = -10
t = 5
5a – 15 + 9a = 3a + 29
14a – 15 = 3a + 29
Add 15 to both sides and subtract 3a from both sides
11a = 44
a = 4
y – 7 > 3 + 2y
Subtract 2y from both sides and add 7 to both sides.
-y > 10
Divide both sides by -1.
y < -5
15 + 6n < -33
Subtract 15 from both sides
6n < -48
Divide both sides by 6
n < -8
(-15)^2 = (-15)(-15) = 225
Singapore Math: Grade 3a, Unit 1 (part 1)
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