Answer:
20
Step-by-step explanation:
if 7 nails are required for each piece of wood, you must determine how much wood you have in total by dividing the amount of nails by 7.
If you have used 40 nails out of sixty, you 20 left because
60-40=20
Answer:
$7,000 at 7%; $13,000 at 8%
Step-by-step explanation
x: the amount invested at 7%
y: the amount invested at 8%
x + y = 20,000
7%.x + 8%.y = 1,530
⇒ x =7,000
y = 13,000
Answer:To graph a linear equation in slope-intercept form, we can use the information given by that form.
Step-by-step explanation:
Answer:
Step-by-step explanation:
fun one - thanx 4 posting!!!
let the interaction of BK and NO be P
and NO be x
triangle NBO n ABC are similar by AAA as NO // AC
so BP/BK=NO/AC=x/30
BP=10*x/30=x/3
PK=height of triangle NMO
cuz' NM=MO n m∠NMO=90°
height of triangle NMO=NO/2=x/2
PK=x/2
area of triangle NBO + area ot trapezoid NOCA = area of triangle ABC
BP*NO/2 + (NO+AC)*PK/2 = BK*AC/2
(x/3)*x/2+(x+30)*x/2 = 10*30/2
simplifying x^2/6+x^2/4+30x/4=150
5x^2+90x-1800=0
solving x=12 or x=-30
as length cannot be negative
NO=12
