An order of walnuts and almonds weighs 14 pounds and costs $44.

Walnuts: $2.00 per pound
Almonds: $4.00 per pound
How many pounds of walnuts and almonds are in this order?
Start by writing an expression to represent the cost of w pounds of walnuts. Keep in mind that 1 pound of walnuts costs $2.00
Cost of w
pounds of
walnuts
+
Cost of a pounds of almonds
=
Total Cost
+
?
=
?

1 answer

Let's denote the number of pounds of walnuts as \( w \) and the number of pounds of almonds as \( a \).

The cost for \( w \) pounds of walnuts, given that walnuts cost $2.00 per pound, can be expressed as:

\[ \text{Cost of } w \text{ pounds of walnuts} = 2w \]

The cost for \( a \) pounds of almonds, given that almonds cost $4.00 per pound, can be expressed as:

\[ \text{Cost of } a \text{ pounds of almonds} = 4a \]

We also know that the total cost of the order is $44, so we can write the equation for total cost:

\[ 2w + 4a = 44 \]

Additionally, we know that the total weight of the nuts is 14 pounds:

\[ w + a = 14 \]

Now we have a system of equations:

  1. \( 2w + 4a = 44 \)
  2. \( w + a = 14 \)

You can solve this system of equations to find the values of \( w \) and \( a \). To solve the second equation for \( a \), we get:

\[ a = 14 - w \]

Now we can substitute \( a \) in the first equation:

\[ 2w + 4(14 - w) = 44 \]

Distributing the 4:

\[ 2w + 56 - 4w = 44 \]

Combining like terms:

\[ -2w + 56 = 44 \]

Subtracting 56 from both sides:

\[ -2w = 44 - 56 \]

\[ -2w = -12 \]

Dividing both sides by -2:

\[ w = 6 \]

Now, substituting \( w \) back into the equation for \( a \):

\[ a = 14 - w = 14 - 6 = 8 \]

So, the order consists of:

  • Walnuts: 6 pounds
  • Almonds: 8 pounds

In summary:

  • Number of pounds of walnuts: \( 6 \)
  • Number of pounds of almonds: \( 8 \)