Answer:
18 parts of the 25% acid solution and 12 parts of the 50% acid solution
Step-by-step explanation:
(a) Let the system of equations be
(1) A × x + B × y = 0.4 × 30
and A + B = 30
where x = 25% acid solution and y = 50% acid solution
Simplifying, we get
A × 0.25 + B × 0.5 = 0.4 × 30 = 12
or (i)A + 2 × B = 48
and (ii) A + B = 30
b) See the attached graph
as the 25% acid solution is increasing the 50% acid solution also increases
c) From the equations
(i)A + 2 × B = 48
and (ii) A + B = 30
we get from equation (ii) A = 30 - B
Substituting for A in equation (i) we get
A + 2 × B = 48 ▶ 30 - B + 2 × B = 48
or 30 + B = 48 or B = 12
and A + B = 30 or A = 30 - B = 30 - 12 = 18
A = 18 and B = 12
Answer:
11.2 ounces
Step-by-step explanation:
Answer:
$4.48
Step-by-step explanation:
just multiply 0.2990 and 15
Step-by-step explanation:
OK so add the 66 and the square=90, so add 66 and 90 then subtract it from 180 and then you will get x
Subtract 11 from 5 to get -6.
Because the equation is in between two vertical lines, this means the absolute value, which is a positive value, so -6 becomes positive 6.
The answer is 6