Mathematics, 14.07.2019 08:30 Andy0416
The work of a student to solve the equation 2(4x − 4) = 8 + 4x + 4 is shown below: step 1. 2(4x − 4) = 8 + 4x + 4 step 2. 6x − 6 = 12 + 4x step 3. 6x − 4x = 12 + 6 step 4. 2x = 18 step 5. x = 9 in which step did the student first make an error and what is the correct step? step 2, 8x − 6 = 2(6 + 2x + 2) step 2, 8x − 8 = 12 + 4x step 3, 6x − 4x = 12 − 6 step 3, 6x + 4x = 12 + 6
Answers: 1
Mathematics, 21.06.2019 21:40
If angle b measures 25°, what is the approximate perimeter of the triangle below? 10.3 units 11.8 units 22.1 units 25.2 units
Answers: 2
Mathematics, 22.06.2019 00:00
If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9
Answers: 1
Mathematics, 22.06.2019 00:50
Astudent is determining the influence of different types of food on the growth rate of spiders. she feeds one group of spiders two caterpillars twice a week. the other group received similarly-sized beetles twice a week. she records the amount of time required for individuals to reach sexual maturity. her hypothesis is that the spiders feeding on caterpillars will have a faster growth rate because caterpillars have a higher protein content compared to beetles. in this experiment, what is the dependent variable? spiders assigned to different feeding groups. time required to reach sexual maturity number of prey items fed twice a week. growth rates of each group.
Answers: 2
The work of a student to solve the equation 2(4x − 4) = 8 + 4x + 4 is shown below: step 1. 2(4x − 4...
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