21. x + 3.4 = 5\n1 point\n1.6\n2.1\n3.6\n8.4\n22. on one roll a 1 - 6 number cube, what is the probability…

21. x + 3.4 = 5\n1 point\n1.6\n2.1\n3.6\n8.4\n22. on one roll a 1 - 6 number cube, what is the probability that the upturned face will show an even number of dots?\n1 point\n1/6\n1/2\n2/3\n1

21. x + 3.4 = 5\n1 point\n1.6\n2.1\n3.6\n8.4\n22. on one roll a 1 - 6 number cube, what is the probability that the upturned face will show an even number of dots?\n1 point\n1/6\n1/2\n2/3\n1

Answer

Explanation:

Step1: Solve for x in the equation

To find x in (x + 3.4=5), we use the subtraction - property of equality. Subtract 3.4 from both sides of the equation. (x=5 - 3.4) (x = 1.6)

Step2: Calculate the probability of getting an even - numbered face on a 1 - 6 number cube

The sample space when rolling a 1 - 6 number cube is (S={1,2,3,4,5,6}), and the number of elements in the sample space (n(S)=6). The set of even - numbered faces is (E = {2,4,6}), and the number of elements in the set of even - numbered faces (n(E)=3). The probability formula is (P(E)=\frac{n(E)}{n(S)}). (P(E)=\frac{3}{6}=\frac{1}{2})

Answer:

  1. A. 1.6
  2. B. 1/2