Let f be amount of 43% and s be amount of 16%...
s+f=90, f=90-s
(.16s+.43f)/90=.25 using f found above we get:
(.16s+.43(90-s))/90=.25
.16s+38.7-.43s=22.5
-.27s=-16.2
s=60, and since f=90-s, f=30
So the chemist will need to mix 60ml of 16% solution with 30ml of 43% solution to create 90ml of a 25% solution.
Answer:
x = 6
Step-by-step explanation:
Since the triangles are similar then the ratios of corresponding sides are in proportion, that is
= 
, substitute values
= 
= 
( cross- multiply )
2x = 12 ( divide both sides by 2 )
x = 6
Answer:
7/12 of a mile
Step-by-step explanation:
1/4 + 2/6
1/4 + 1/3
LCM is 12
(3×1 + 4×1)/12
7/12
Answer:
-2
Step-by-step explanation:
2(x-4)+3x-x² for x = 3
is : 2(3-4) +3(3)-3² = -2 ... answer : B
Answer:
your answer is x >18
Step-by-step explanation:
Jahsiah's mistake was he added 9 to both sides of the equation. He should have subtracted 9 from both sides of the equation.
Here's the solution
-2x+9<-27
-9 -9
-2x/-2x<-36/-2x
when u divide by negative in inequalities, u change the sign. So ur correct answer is x>18
hope this helped.
