Answer:
(x) =
Step-by-step explanation:
let y = g(x) and rearrange making x the subject
y = x - 9 ( add 9 to both sides )
y + 9 = x
Multiply both sides by 5 to clear the fraction
5y + 45 = 3x ( divide both sides by 3 )
= x
Change y back into terms of x, thus
(x) =
Answer:
12c +9 = Perimeter
Step-by-step explanation:
The perimeter of a triangle is found by adding all the sides
3c+4 + 5c-2 + 4c +7 = Perimeter
Combine like terms
12c +9 = Perimeter
Answer:
x=-4 or x=-8
Step-by-step explanation:
I think those are correct. Pls let me know if they are wrong.
Answer:
C. 75mL
Step-by-step explanation:
Let's find the solution.
Let's consider that the stock solution is XmL.
Also let's consider than the amount of diluent required is Y.
Because we need to add YmL to the stock solution to obtain a 100mL solution, then:
X+Y=100 which can be written as:
X=100-Y (eq. 1)
Now, the stock solution is 80% which means:
0.8=n/X where n is the solute, which can be written as:
n=0.8X (eq. 2)
Because we are trying to make a 100mL of a 20% solution then:
0.2=n/100, using eq. 2 we have:
0.2=(0.8X)/100, using eq. 1 we have:
0.2=0.8*(100-Y)/100
0.2*100/0.8=100-Y
25=100-Y
Y=100-25=75
In conclusion, we need to add 75mL, so the answer is C.
Answer:
Inflation is caused by the increase in prices of goods, and as prices of goods rise, the value of money itself would decrease. By saving money in a savings account with interest that might be equal or more than the level of inflation, your money would increase, which protects you from the devaluation of the savings you hold and the rising prices of goods.