If s varies directly as t, and s=8 when t=16,then find t when s=16

well since s=8 i the first example and t=16 we know that 2s=t because it says s varies directly. so 16*2=32 t when s=16 is 32

t=32

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70