Answer:
Option A is correct.
Step-by-step explanation:
2x+3y=25
4x+2y=22
Option A
2y = 22-4x
y = 11 -2x
Option B
2x = 25 -3y
x = 25/2 -3/2y
Option C
3y = 25 - 2x
y = 25/3 -2/3x
Option D
4x = 22 - 2y
x = 22/4 -2/4y
x = 11/2 -1/2y
In Option B,C and D we have fractions and for substitution the calculations will be complex.
But Option A has no fractions and solving by putting the value of y in equation 1 is easy.
So, Option A is correct.
Answer: 19nickels and 7dimes.
Ps i really don’t know where the 50.05 came from if it is suppose to be there then I really don’t know how to solve this.
Step-by-step explanation:
Ok so if you know that there are 19nickels, let n=number of nickels.
The number of total coins subtracted by number of nickels will give you number of dimes.
165-number of nickels=number of dimes
Value of dimes=10(number of dimes) or total value of dimes/individual value (10cent)
Then you can substitute total as $1.65 and get the value of nickels by multiplying by 5cent ( my teacher taught me using whole numbers to make it easier so I turned $1.65 to 165 cent). Since the value of the dimes is the value of nickels subtracted from the total, I can subtract 95 from 165 and divide the difference by 10, to get the number of dimes.
5(n)=5(19)=95
(165-95)/10=number of dimes
70/10=7dimes
You can check by multiplying 7x10 and 5x15 again and adding them together to see if they equal 165 cent.
Answer:
1/6
Step-by-step explanation:
5/6 and 4/6 have the same common denominator so you dont have to mess with the bottom numbers. all you will do is subtract 5-4=1. now you have 1/6
4x+3 times -1 reflects the graph about the x axis
-4x-3 adding 6 moves the graph upwards by 6 units
-4x-3+6
-4x+3
Answer:
well if it is 5% each week, then it would be 20 +1. doing this for 25 weeks means it would be 20 + 25 then.
Step-by-step explanation:
Sorry if wrong. i don't know if u do 5% after each time or from the main number. it doesn't say wheather or not.