A=-2 and b=5.
To have an infinite number of solutions, the two sides must be identical.
6x+15=-3(ax-b)
Using the distributive property,
6x+15=-3*ax--3*b
6x+15=-3ax+3b
This means -3ax=6x and 3b=15;
-3ax=6x
Divide both sides by -3:
-3ax/-3 = 6x/-3
ax=-2x
Divide both sides by x:
ax/x=-2x/x
a=-2
3b=15
Divide both sides by 3:
3b/3=15/3
b=5
Answer:
Step-by-step explanation:
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D = number of dogs washed
c = number of cats washed
d = (60 - 5c) / 7.50
The 7.50 should be underneath the brackets
Answer:
after 1.25 hours
Step-by-step explanation:
1. make 130 your y value
130 = 220 - 72x
2. subtract 220 from both sides
-90 = -72x
3. divide by -72 on both sides
1.25 = x