You do the same as whole numbers! Make sure the denominators are the same, add them all up, and then divide by the number of fractions there are!
Answer:
q = 6/13, p = 35/13
Step-by-step explanation:
3p + 2q = 9
2p - 3q = 4
_________ (subtract the two equation from each other.)
p + 5q = 5
p = 5 - 5q
2(5 - 5q) - 3q = 4 (substitute value of p into equation)
10 - 10q - 3q = 4
10 - 13q = 4
-13q = -6
<u>q = 6/13</u>
3p + 2(6/13) = 9 (substitute value of q into equation)
3p + 12/13 = 9
3p = 105/13
<u>p = 35/13</u>
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Answer:
8 pounds of cheaper candy,
17.5 pounds of expensive candy
Step-by-step explanation:
Let's define some variables. Let's say the amount of pounds of candy that sells for $2.20/lb is x, and the $7.30 is y. Now we can write some equations!
x + y = 25.5
We can start substitution. We can say that x = 25.5 - y. Plugging this into our second equation, we get:
y = 17.5
Plugging this in, we find that:
x = 8.
The answer is c. 66 square inches.
Answer:
f(4) = -129
Step-by-step explanation:
Substitute the value of x which is 4
f(x) = -2x4 + 6x3 - 3x + 11
f(4) = -2(4)4 + 6(4)3 - 3(4) + 11
f(4) = -2(256) + 6(64) - 12 + 11
f(4) = -512 + 384 - 1
f(4) = -128 - 1
f(4) = -129
