Let a1equals[start 3 by 1 matrix 1st row 1st column 1 2nd row 1st column 2 3rd row 1st column negative 1 endmatrix ], a2equals[start 3 by 1 matrix 1st row 1st column negative 7 2nd row 1st column negative 7 3rd row 1st column 2 endmatrix ], and bequals[start 3 by 1 matrix 1st row 1st column 3 2nd row 1st column negative 22 3rd row 1st column h endmatrix ]. for what value(s) of h is b in the plane spanned by a1 and a2?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.

The null and alternate hypotheses are: h0: μ1 ≤ μ2 h1: μ1 > μ2 a random sample of 22 items from the first population showed a mean of 113 and a standard deviation of 12. a sample of 16 items for the second population showed a mean of 99 and a standard deviation of 6. use the 0.01 significant level. find the degrees of freedom for unequal variance test. (round down your answer to the nearest whole number.) state the decision rule for 0.010 significance level. (round your answer to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? use the 0.01 significance level.

The interior angles formed by the sides of a hexagon have measures that sum to 720°. what is the measure of angle a? enter your answer in the box. m∠a= °