
Solve the following using Substitution method
2x – 5y = -13
3x + 4y = 15


- To solve a pair of equations using substitution, first solve one of the equations for one of the variables. Then substitute the result for that variable in the other equation.

- Choose one of the equations and solve it for x by isolating x on the left-hand side of the equal sign. I'm choosing the 1st equation for now.

- Add 5y to both sides of the equation.


- Multiply
times 5y - 13.

- Substitute
for x in the other equation, 3x + 4y = 15.

- Multiply 3 times
.

- Add
to 4y.

- Add
to both sides of the equation.

- Divide both sides of the equation by 23/2, which is the same as multiplying both sides by the reciprocal of the fraction.

- Substitute 3 for y in
. Because the resulting equation contains only one variable, you can solve for x directly.


- Add
to
by finding a common denominator and adding the numerators. Then reduce the fraction to its lowest terms if possible.

- The system is now solved. The value of x & y will be 1 & 3 respectively.

What is the question asking for?
Answer:
B) 122.5π cm3
Step-by-step explanation:
Volume of a cylinder = 
r= radius , but we are given diameter or 7cm, radius = diameter/2 =7/2 = 3.5cm
h= height, given as 10cm

Next, plug in the numbers into the formula;

Therefore, the volume of soup in the can is 122.5
Answer:
The answer is: 3 1/3.
Step-by-step explanation:
Answer: 43/14
Step-by-step explanation: You take you 3 and times it by 14 and + 1 because the equation is saying 14/14 3 times plus the 1/14,
So 3 times 14=42
42+1=43 and then you take the 43 and put it over the 14 so now you have your answer: 43/14