Use a calculator to find the acute angle between the planes to the nearest thousandth of a radian.-2x - 5y - 3z = -6 and 2x + 2y - 9z = 3
A. 1.202 rad
B. 1.345 rad
C. 0.225 rad
D. 1.398 rad
Answer: B
Mathematics
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Suppose 
is a linear function with 
. If the slope of 
style="vertical-align:middle;" /> is 2.34, what is the value of 
?
?
A. 23.53
B. 27.4
C. 23.4
D. 27.77
Mathematics
Solve the following quadratic equation using the quadratic formula. Find the exact answer. If there are no real solutions, so state.2x2 + 2x + 8 = 0
A. no real solution
B. x = 3 or x = 2
C. x = 
D. x = 
or x = 
Mathematics
Use half-angle identities to find the exact value of the expression.sin 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The half-life of radium is 1690 years. If 150 grams is present now, how long (to the nearest year) till only 100 grams are present?
Fill in the blank(s) with the appropriate word(s).
Mathematics