The gardener wanted to find the best water to use for growing his plants. If plants need a more neutral pH water for optimal gro
wth, then a pH that is too high or too low will result in less plant growth. The gardener had 4 groups of water treated plants: 1. pH 4 acid water;
2. tap water of pH 6.8;
3. near neutral deionized water;
4. pH 8 basic water.
He would water everyday and every 3 days the gardener would measure and record the height of the plants in centimeters. After 5 weeks the gardener concluded that the tap and deionized water were almost double the height as the pH 4 and pH 8 water.
Identify the:
1. Independent Variable
2. Dependent Variable
3. Control
Let x=the first number Then x+7=second number And 4(x+7)+2=third number (2 more than 4 times the second) Now we are told that: x+(x+7)+(4(x+7)+2)=85 get rid of parentheses x+x+7+4x+28+2=85 simplify 6x+37=85 subtract 37 from each side 6x+37-37=85-37 6x=48 x=8---first number x+7=8+7=15 second number 4(x+7)+2=4*15+2=62 third number CK 8+15+62=85 85=85
