1.
what is the value of r in the equation 4r β 8 = 5r + 12? (4 points)
β20...
Mathematics, 04.10.2019 20:40 erjalinalii
1.
what is the value of r in the equation 4r β 8 = 5r + 12? (4 points)
β20
β1
1
20
2.
which of these is a simplified form of the equation 8y + 4 = 6 + 2y + 1y? (4 points)
5y = 2
5y = 10
11y = 2
11y = 10
3.
what is the value of n in the equation 3n + 2(n + 2) = 9n + 12? (4 points)
β4
β2
2
4
4.
how many solutions can be found for the equation β4x β 11 = 2(x β 3x) + 13? (4 points)
none
one
two
infinitely many
5.
the work of a student trying to solve the equation 2(2x β 3) = 6 + 2x + 4 is shown below:
step 1: 2(2x β 3) = 6 + 2x + 4
step 2: 4x β 3 = 10 + 2x
step 3: 4x β 2x = 10 + 3
step 4: 2x = 13
step 5: x = 6.5
in which step did the student first make an error and what is the correct step? (4 points)
step 2: 4x β 6 = 10 + 2x
step 2: 4x β 3 = 2 + 2x
step 3: 4x + 2x = 10 + 3
step 3: 4x β 2x = 10 - 3
Answers: 2
Mathematics, 21.06.2019 20:10
Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)
Answers: 3
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Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.
Answers: 1
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Answers: 1
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The base of a rectangular pyramid is 13 inches long and 12 inches wide. the height of the pyramid is 8 inches. what is the volume of the pyramid
Answers: 3
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