Answer:
18: 3/4
19: 5/8
20: 1/2
21: 9/10
22: 2/3
23: 5/6
24: 4/9
25: 2/7
26: 3/4
27: 7/10
28: 4/5 (I'm in a rush, so make sure to double check the answers)
Answer: 
Step-by-step explanation:
<u>Given the system of equation</u>
<u>Expand the parenthesis of the 1) equation</u>
<u>Current System</u>
<u>Substitute the y value of the 1) equation with the 2) equation</u>
<u>Add ( x² + 4x + 3) on both sides</u>
<u>Combine like terms</u>
<u>Factorize the quadratic equation</u>
<u>Substitute the x values into one of the equations to find the y value</u>
<u>Therefore, the two solutions are:</u>
Hope this helps!! :)
Please let me know if you have any questions
(5 7/8-6 3/4)-2 1/4
Solve the numbers in the parenthesis ( I change the denominators to a common denominator that 8 and 4 share)
(5 7/8 - 6 3/4)-2 1/4
^
-1 1/8-2 1/4
(I use KKC aka Keep Change Change where I keep -1 1/8 the same, change the minus sign to a plus sign, and change the -2 1/4 to positive) ( I change the denominators to a common denominator that 8 and 4 share)
-1 1/8 + +2 1/4 = 1 1/8
260 minutes. 4 times 60 = 240 + 20 minutes i s the quarter
0.4 is 10 times as much as 0.04
this is because 0.04 times 10 is 0.4
0.003 is 1/10 of 0.03
0.003 times 10 is 0.03
