Two ways to do it.
1
if we decrease 10%, then we'll have the 90% of the original, so we have:
= 680(90%)
= 680(90/100)
= 612
then 612 is 680 decreased by 10%
2
what is the 10% of 680, call it y?, then reduce it from 680
y = 10%(680) = (10/100)(680) = 68
So, to decrease 680 by 10%, we subtract 680 - 68 = 612
Answer:
x= 5/2, x= -3
4x^2+2x-30=0; Factor that without the 0. Then you get 2 (2x-5) (x+3)=0.
2x-5=0 x= 5/2
x+3=0 x= -3
Hope this helps! :D
tan = opposite/hypotenyse
for B, this is 24/25
24/25 = 0.96
Answer:-1/6
Step-by-step explanation:
-1/2 + (3/4times4/9)
-1/2 + (3/4 x 4/9)
-1/2 + (3x4)/(4x9)
-1/2 + 12/36
(18 x -1 + 1 x 12)/36
(-18+12)/36
-6/36=-1/6
