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The student council bought two various kinds of candy for the school fair. They purchased 40 pounds of candy at $2.15 per pound and x pounds at $1.90 per pound. What is the total number of pounds they bought if the total amount of money spent on candy was $158.20?
Let x = the amount of candy at $1.90 per pound. Let y = the total number of pounds of candy purchased. If it is known in which there are 40 pounds of candy at $2.15 per pound, after that the total amount of candy can be expressed as y = x + 40. Use the equation 1.90x + 2.15(40) = $158.20 because the total amount of money spent was $158.20. Multiply on the left side: 1.90x + 86 = 158.20. Subtract 86 from both sides: 1.90x + 86 - 86 = 158.20 - 86. Simplify: 1.90x= 72.20. Divide both sides by 1.90: 1.90x/1.90 = 72.20/1.90; so, x = 38 pounds, that is the amount of candy in which costs $1.90 per pound. Thus, the total amount of candy is 38 + 40, that is 78 pounds.
Price Cutter sold 85 beach towels for $6.95 each. What were the total sales? You must multiply the number of towels sold through the price of each towel; 85 × $6.95 = $590.75.
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commutative law
writing sin 3 a.cos 3 a = sin 3 a.cos 2 a.cosa = sin 3 a.(1-sin 2 a).cosa put sin a as then cos a da = dt integral(t 3 (1-t 2 ).dt = integral of t 3 - t 5 dt = t 4 /4-t 6 /6
What is a lattice? Which of the following graphs are lattice and why? Ans: Let (L, ≤) be a poset. If each subset {x, y} consisting of any two elements of L, comprises a glb (I
Average cost function : Now let's turn our attention to the average cost function. If C ( x ) is the cost function for some of the item then the average cost function is,
I need answers for these 10 exam questions: 1.Input-output (Leontief) model: main assumptions and construction. Definition of productivity. Necessary condition of productivity of i
sin (cot -1 {cos (tan -1 x)}) tan -1 x = A => tan A =x sec A = √(1+x 2 ) ==> cos A = 1/√(1+x 2 ) so A = cos -1 (1/√(1+x 2 )) sin (cot -1 {cos (tan -1 x)}) = s
Here are four problems. Four children solved one problem each, as given below. Identify the strategies the children have used while solving them. a) 8 + 6 = 8 + 2 + 4 = 14 b)
A die is rolled twice and the sum of the numbers appearing on them is observed to be 7.What is the conditional probability that the number 2 has appeared at least once? A) 1/3
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