Answer:
Step-by-step explanation:
T = x
S = 2x
J = 15
x + 2x + 15 = 63
3x = 63 - 15
3x = 48
x = 16
Tim has 16 marbles, Sue has 32 marbles and Jim has 15 marbles
Answer:
4.47
Step-by-step explanation:
3x²+31=91
3x²=91-31
3x²=60
x²=60÷3
x²=20
x=√20
x=4.47
Answer:
1.1
Step-by-step explanation:
1 in probability means always so anything greater than 1 is meaningless