Do Now #137

Subtract the following polynomials:
(3x²-3x+2)-(x²-2x+1)

• 2x²+x+1
• 2x²-5x+3
• 2x²-x+1
• 4x²-5x+3

Tags

CCSS.HSA.APR.A.1

As x increases beyond 25, which function will have the largest value?

• f(x) = 1.5^x

• g(x) = 1.5x + 3

• h(x) = 1.5x²

• k(x) = 1.5x³ + 1.5x²

Tags

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.3

Milton has his money invested in a stock portfolio. The value, v(x), of his portfolio can be modeled with the function, v(x) = 30,000(0.78)^x, where x is the number of years since he made his investment. Which statement describes the rate of change of the value of his portfolio?

• It decreases 78% per year.

• It decreases 22% per year.

• It increases 78% per year.

• It increases 22% per year.

Tags

CCSS.HSF.LE.B.5

Firing a piece of pottery in a kiln takes place at different temperatures for different amounts of time. The graph

below shows the temperatures in a kiln while firing a piece of pottery after the kiln is preheated to 200ºF.

During which time interval did the temperature in the kiln show the greatest average rate of change?

• 0 to 1 hour

• 1 hour to 1.5 hours

• 2.5 hours to 5 hours

• 5 hours to 8 hours

The ages of 9 students are listed below
5, 7, 9, 10, 13, 14, 14, 17, 19
Which of the following is true:

• mode < mean < median
• mean < median < mode
• mode < median < mean
• median < mode < mean

Tags

CCSS.HSS.ID.A.2

Which answer choice describes  y = -3x² +7x - 2 accurately?

• opens up with a maximum
• opens up with a minimum
• opens down with a maximum
• opens down with a minimum 

Tags

CCSS.HSF-IF.C.7A

• She was standing still.

• She was increasing her speed.

• She was decreasing her speed.

• She was jogging at a constant rate.

If the area of a rectangle is expressed as x⁴ — 9y², then the product of the length and the width of the rectangle could be expressed as

• (x — 3y)(x + 3y)
• (x² — 3y)(x² + 3y)
• (x² — 3y)(x² — 3y)
• (x⁴ + y)(x — 9y)

Tags

CCSS.HSA.APR.C.4

What are the zeros of the function f(x) = x² — 13x — 30? 

• —10 and 3
• 10 and —3
• —15 and 2
• 15 and —2

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

Ashley had a summer lemonade stand where she sold small cups of lemonade for $1.25 and Large cups for $2.50. If Ashley sold a total of 155 cups for $265, which system could be used to determine the number of small (x) and large (y) cups she sold? 

• x + y = 265 
  1.25x+2.5y=155 
• x + y = 155
  2.5x+1.25y=265
• x + y = 265
  2.5x+1.25y=155
• x + y = 155
  1.25x+2.5y=265

Tags

CCSS.8.EE.C.8C