Answer:
(-8/7 ; 5/7)
Step-by-step explanation:
5t + 1/2s = 3 - - - (1)
3t - 6s = 9 - - - - - (2)
Multiply (1) by 12 and (2) by 1
Add the result to eliminate s
60t + 6s = 36
3t - 6s = 9
____________
63t = 45
t = 45 / 63
t = 5/7
Put t = 5/7 in either (1) or (2) to obtain the value of s
3(5/7) - 6s = 9
15/7 - 6s = 9
-6s = 9 - 15/7
-6s = (63 - 15)/7
-6s = 48/7
s = 48/7 * - 1/6
s = - 8/7
Answer:
true
Step-by-step explanation:
Answer:
5,8,13,20
Step-by-step explanation:
f(n)=n²+4
f(1)=1²+4=1+4=5
f(2)=2²+4=4+4=8
f(3)=3²+4=9+4=13
f(4)=4²+4=16+4=20
Explanatory variable, or the independent variable. The two are interchangeable, but explanatory is more likely to be used in statistics, and independent variable is used practically everywhere else.
