Answer/Step-by-step explanation:
3. By substitution method, let's substitute 
for y in the first equation.
Thus,
Solve for x
Add 4 to both sides
Multiply both sides by 3
Divide both sides by 5
Now, substitute 3 for x in the equation.
The solution of the equation is x = 3, y = -2
4. Solving by elimination, let's try to eliminate the x-variable by adding both equation together.
=> 
Divide both sides by -3 to solve for y
Substitute -5 for y in the first equation to find x
Subtract 10 from both sides
Divide both sides by 3
The solution is 
Step-by-step explanation:
there's a 6 out of 15 chance of pulling a black pen
Option C is your answer.
Add (- 3) + 2 to get - 1 for the exponents. 2^ (-1) is the same as 1 / 2^1 which is 1/2.
Answer:
Step-by-step explanation:
First of all, let us lay out the problem clearly:
This can be solved using a calculator, by first simplifying the individual fractions first, to decimals, then computing the addition and subtraction.
using your calculator, punch (-50 ÷ 54), your results should be:
-50 ÷ 54 = -0.93
Next, punch ( 40 ÷ 100), you should get 0.4
Now, join the individual results together to get:
- 0.93 - 0.40 + 1.65
Finally, still using the calculator, input the values as shown:
- 0.93 - 0.40 + 1.65 = 0.32
5.95x2= 11.9
-2.67-11.9=-14.57
Her balance aftern2 days will be $-14.57
