Evaluate the following expression if w = 10, x = 8, y = 6, z = 4
3y - w

8

Step-by-step explanation:

3y - w

substitute y for 6 (given)

3 * 6 - w

18 - w

now substitute w for 10 ( given)

18 - w

18 - 10

8

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752