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krek1111 [17]
3 years ago
12

Evaluate the expression when x=1/2 and y=-5 -2xy

Mathematics
2 answers:
Ainat [17]3 years ago
5 0

Answer: Y=-5/2

Step-by-step explanation:

Komok [63]3 years ago
4 0

Answer:

5

Step-by-step explanation:

=-2 times 1/2 times -5

=-1 times -5 (negative times negative equals positive)

=5

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Please Help.
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Answer:
amount of nuts = 2 pounds
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Explanation:
We are given that x is the amount of nuts and y is the amount of dried fruit.
We are also given that:
1- Hunter needs to make 6 pounds of trail mix. This means that:
x + y = 6
This can be rewritten as:
x = 6 - y .........> equation I
2- x costs $4 per pound, y costs $3.5 and Hunter can spend a total of $22. This means that:
4x + 3.5y = 22 ..........> equation II

Substitute with equation I in equation II and solve for y as follows:
4x + 3.5y = 22
4(6-y) + 3.5y = 22
24 - 4y + 3.5y = 22
24-22 = 4y-3.5y
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Substitute with y in equation I to get the value of x as follows:
x = 6-y
x = 6-4
x = 2 pounds

Hope this helps :)

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