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Peyton J.

Indiana University graduate with years of tutor experience

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Spanish

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Question:

Fill in the correct preterite form: Ayer yo ____ (ir) centro comercial para un nuevo par de zapatos.

Peyton J.

Answer:

Ir is an irregular form in the preterite. yo fui tú fuiste él/ella fue nosotros fuimos ellos/ellas fueron Correct answer: Ayer yo fui centro comercial para un nuevo par de zapatos

Statistics

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Question:

Given the data set 4 , 10 , 7 , 7 , 6 , 9 , 3 , 8 , 9 Find; a) the mode, b) the median, c) the mean, d) the sample standard deviation.

Peyton J.

Answer:

a) 7 and 9 b) first order the data; 3, 4, 6, 7, 7, 8, 9, 9, 10 cross out one number on each side until one number is left = 7 c) mean: (3+4+6+7+7+8+9+9+10)/9 = 7 d) For each number in the data set (those are x) plug them into the following equations in categories; x, x-m, (x-m)^2. Where m = the mean x x-m (x-m)^2 4 4 -3 9 10 10 3 9 7 7 0 0 7 7 0 0 6 6 -1 1 9 9 2 4 3 3 -4 16 8 8 1 1 9 9 2 4 sum= 44 Do sample standard deviation: s=$$\sqrt{(44/(9-1)}$$ s= 2.3452, round up to two decimal places s=2.35

Algebra

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Question:

Solve the equation: 2(-2x+3)+(2x-5)=2(x-3)-(5x-9)

Peyton J.

Answer:

First multiply factors: -4x+6+2x-5=2x-6-5x-9 Add like terms: -2x+1=-3x-15 Combine x's to one side x+1=-15 Add like terms again: x=(-16)

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