Step-by-step explanation:
multiply 5x+2y=19 by 3 youll get 15x+6y=57
eliminate y
7x-6y=9
<u>15x+6y=57</u><u> </u> +
22x=66
x=3
substitute x to 5x+2y=19
15+2y=19
2y=4
y=2
Answer:
(a) = 13,500
(b) = 2,250
Step-by-step explanation:
Matching Step 3 with Step 2, we see that ...
(a) = 3x^2·y
(b) = 3x·y^2
Filling in the values given for x and y, we have ...
(a) = 3·30^2·5 = 13,500
(b) = 3·30·5^2 = 2,250
" 3/4 cups " is equal to exactly three fourths of one cup, or 0.75 cup .
This one could be 8/10, or 4/5 simplified
