Let the cost of sandwich and drink be X dollar !
so eqn ;
A) 15℅ of X +2.95 = 20 ℅ of X
solving.....
.20x - .15x = 2.95
.05x = 2.95
x = 2.95/.05 = 59 dollars
B) so the cost of both is 59 dollars !!
Answer:
Step-by-step explanation:
According to the diagram ,
Hypotenuse = 10√3
Opposite = x
Adjacent = y
α = 60
Using SOHCAHTOA ,
Sin α = opp / hyp
Sin 60= x/10√3
√3/2= x/10√3
x = 15
Pythagoras theorem ;
Hypotenuse ^2 = Opposite ^2 +Adjacent ^2
10√3 ^2 = 15^2+ y^2
300 = 225 +y ^2
300 -225 = y^2
75 = y^2
y = √75y
y = 5√3
Answer:
B
Step-by-step explanation:
The answer is B (OB. Fifty people are put into a control group and nfty people are put into a test group. The control group is given a placebo and the
test group is given a new medication. Each group is asked about the side effects.) because an experiment requires a control group and a test group chosen at random.
The exact form is 7/10
Decimal for is 0.7