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astra-53 [7]
1 year ago
5

Rachel's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Rachel $4.30 per pound, and typ

e B coffee costs $5.90 per pound. This month, Rachel made 148 pounds of the blend, for a total cost of $738.80. How many pounds of type B coffee did she use?
Mathematics
1 answer:
Sergio039 [100]1 year ago
8 0

Step 1

Write out the system of equations

let\text{ x represent pound of Type A coffee and y represent Type B coffee pound }\begin{gathered} 4.30x+5.9y=738.80----(1) \\ x+y=148---(2) \end{gathered}

Step 2

Find the value of one pound of type A coffee, x

\begin{gathered} From\text{ equation 2; x+y=148} \\ Therefore \\ y=148-x \end{gathered}\begin{gathered} Substitute\text{ for y in equation 1} \\ 4.30x+5.9(148-x)=738.80 \\ 4.30x+873.2-5.9x=738.80 \\ 873.2-738.80=5.9x-4.3x \\ 134.4=1.6x \\ x=84pounds \end{gathered}

Therefore the answer will be;

\begin{gathered} x+y=148 \\ 84+y=148 \\ y=64\text{ pounds} \\  \end{gathered}

The pounds of type B coffee she used is 64pounds

The pounds of type A coffee she used is 84 pounds

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Step-by-step explanation:

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When testing for current in a cable with eight ​color-coded wires, the author used a meter to test five wires at a time. How man
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Step-by-step explanation:

Given:

Number of wires available (n) = 8

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In order to find the number of different tests required for every possible pairing of five wires, we need to find the combination rather than their permutation as order of wires doesn't disturb the testing.

So, finding the combination of 5 pairs of wires from a total of 8 wires is given as:

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3 years ago
Mrs. Johnson measured 3 rectangular rooms that she wants to tile. What is the total area of the​ rooms?
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Answer:

Find the area of each room and add the areas

Step-by-step explanation:

Please find the full question in the attached image

the area of rectangle is length x breadth. The area of each room would be found and the three areas would be added together

for example ,

dimension of room 1 = 5 x 3

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3 years ago
The perimeter of a rectangular movie screen at a local cinema is 148 feet. If the length of the screen is 30 feet longer than th
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The perimeter of a rectangle = 2(l + w)

l = length

w = width

In this problem,

w = x

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Let's plug our values into the perimeter formula above.

148ft = 2(x + x + 30ft)

Combine like terms.

148ft = 2(2x + 30ft)

Distribute the 2

148ft = 4x + 60

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Divide both sides by 4

22ft = x

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