Answer:
1. The equations are
2. we can use elimination method to solve the problem
3. She has 50 5$ bills and 30 10 $ bills
4. The values of x and y that we found satisfies the two equations which ensures that the solution is correct.
5. Elimination method involves lesser number of steps when compared with graphical method and substitution method.
Explanation:
Number of 5$ bills=x
Number of 10$ bills=y
Total number of bills=80
total amount=$550
Here we have two equations and we can use elimination method to solve the set of equations
(Equation 1)
(Equation 2)
We have to make the coefficient of one variable in both equations same.
Let us make the coefficient of x same.
(Equation 3)
Subtract (3)from (2)
Substitute the value of y in equation (1)
x=50
y=30
Answer:
Answer is in the explanation.
Explanation:
Let's make a system of equations.
5x+10y=550
x+y=80
Now let's use elimination
-5x-5y=-400
5x+10y=550
__________
5y=150
y=30
Then subsitute 30 in for y to find x. This will leave you with x=50. You will have 50 $5 bills and 30 $10 bills. You can check by subsituting x for 50 and y for 30 in both equations to show why it is correct. Eliminating makes it easier to solve the system of equations.
Answer: Electrons are the particles that circles the nucleus of an atom.
Explanation: Each atom has its nucleus. Nucleus present at the centre of the atom.
Inside the nucleus protons and neutrons are present. Protons has positively charged particles on the other hand Neurons are neutral they have no charge.
So, the positive charge of protons make nucleus a positively charged.
Electrons are negatively charged particles. They circles around the positively charged nucleus. Positive charge of nucleus make negatively charged electrons to circle around nucleus.
oxygen, carbon, and hydrogen. so C
Answer:
C.C, H, O
Explanation:
Oxygen, carbon, and hydrogen...
Doing this will give her a value for the
O A) mean
OB) mode
Oc) range
OD) median
Answer:
The answer would be C) range
Explanation:
Answer:
b. Air pollution, Contributed to the heat wave in Europe and the thousands of death in France.
Explanation:
Answer:
letter C
Explanation:
Answer: greenhouse gases
Explanation: