The percent is 84%. All you have to do is divide 577.92 by 688. Not sure how to make an equation though sorry.
-1/4(2x+5y)
Hope I helped :)
Answer:
<h2>(2)</h2>
Step-by-step explanation:
Because
not
This follows from the formula
Answer: 6 pounds of French roast coffee and 14 pounds of Sumatran coffee was used.
Step-by-step explanation:
Let x represent the number of pounds of French roast coffee that should be added in the blend.
Let y represent the number of pounds of Sumatran coffee that should be added in the blend.
The total number of pounds of the mixture made is 20 lb. This means that
x + y = 20
The mixture sells for $8.30 a pound. The total cost of the mixture would be
8.3 × 20 = 166
This means that
9x + 8y = 166 - - - - - - - - -1
Substituting x = 20 - y into equation 1, it becomes
9(20 - y) + 8y = 166
180 - 9y + 8y = 166
- 9y + 8y = 166 - 180
- y = - 14
y = 14
x = 20 - y = 20 - 14
x = 6
<span><span>(<span><span><span><span>10<span>x5</span></span><span>y12</span></span><span>−5</span></span><span>x<span>−2</span></span></span>)</span><span>(<span>y6</span>)</span></span><span>=<span><span>−<span><span>2<span>x5</span></span><span>y18</span></span></span><span>x2</span></span></span><span>=<span>−<span><span>2<span>x3</span></span><span>y<span>18</span></span></span></span></span>