A software update caused unexpected readings in a space greenhouse, changing the water and light supplied to the plants. Nova, Luna, and Emek studied the control rules, where the water output was modeled by 4x + 6 and the light level by 3x + 10. They evaluated both expressions for x = 8 and compared the results with the expected system values. After identifying the incorrect settings, they restored the greenhouse controls, and the plants began growing normally again.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
Replace x with 8, then multiply before adding.
The water output was modeled by 4x + 6. If x = 8, what is the water output?
34384042Correct! 4 * 8 + 6 = 32 + 6 = 38.
Substitute x = 8 and remember to multiply before adding 6.
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Hint
Replace x with 8 in the expression and calculate.
The light level was modeled by 3x + 10. If x = 8, what light level did the system show?
Correct! 3 * 8 + 10 = 24 + 10 = 34.
Calculate the multiplication first, then add 10.
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Hint
Find both expression values first, then compare them.
The team compared the water output and light level when x = 8. Which statement is correct?
The light level is greater than the water output by 4The water output and light level are equalThe water output is greater than the light level by 4The water output is greater than the light level by 8Correct! The water output is 38 and the light level is 34, so the difference is 4.
Evaluate both expressions before deciding which value is larger.
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