A student blows up a balloon and then places it in a very cold freezer. After a few hours, the balloon has shrunk. Which of the following best explains why the balloon shrunk? As the balloon gets cooler, the molecules gain energy and move closer together, causing the balloon to shrink. As the balloon absorbs energy, the molecules move more quickly, making the balloon expand. As the balloon gets cooler, the molecules break apart, decreasing the volume of the gas. As the balloon gets cooler, the molecules lose energy and move closer together causing the balloon to shrink.

Question
solved
general 11 months ago 3280

1. Tony and his sister Maria have the same birthday but Tony is five years older than Maria. Let the variable x represent Tony's age and y represent Maria's age. Which graph represents the relationship between Tony's age and Maria's age?2. Solve the equation:3 ( x -7 ) - x = 2x - 21A) 7B) -2C) Infinitely many solutionsD) No solution3. Which equation is an identity? a. 8-(5x+2)=-5x-6 b. 7z+10-z=8z-2(z-5) c. 8m-4=5m+8-m d. 6y+5=6y-5 4. Which equation has no solution? A) 7v+2=8v-3B) 3x-5=3x+8-x C) 4y+5=4y-6 D) 7z+6=-7z-5

Question
solved
general 11 months ago 8484

Kent walked to the bus stop, then sat and waited until the bus arrived. He rode the bus for 25 minutes, then walked the last 3 blocks to work. Which graph best represents the scenario? A coordinate plane graph is shown. The x-axis is labeled time and the y-axis is labeled distance from home in miles. The line increases for 10 minutes, stays horizontal for 15 minutes, increases rapidly for another 25 minutes, then increases slowly for 5 minutes. A coordinate plane graph is shown. The axis is labeled time and the y-axis is labeled distance from home in miles. The line begins at 0 commas 0 and then rises to 20 comma 4, where it drops back down to touch the x-axis at 30 commas 0. It then rises to 40 commas 5 and is horizontal for 15 minutes.A coordinate plane graph is shown. The axis is labeled time and the y-axis is labeled distance from home in miles. A line begins at 0 commas 2, then rises to 20 commas 4. It is horizontal to 30 commas 4 and then increases to 40 commas 5. It is horizontal to 55 commas 5.A coordinate plane graph is shown. The axis is labeled time and the y-axis is labeled distance from home in miles. The line begins at 0 commas 5 and decreases to 15 commas 1 where it is horizontal to 25 commas 1. It increases to 40 commas 5 and then decreases to 55 commas 0.

Question
solved
general 11 months ago 5503