Which of the following gives a valid reason for using the given solution method to solve the system of equations shown? Equation 1: 4x - 5y - 4
Equation ll: 2x + 3y - 2
O Elimination; a coefficient in Equation II is an integer multiple of a coefficient in Equation I
O Substitution; equation I can be solved for x in one step by dividing both sides by 4.
O Elimination; a coefficient in Equation I is an integer multiple of a coefficient in Equation II.
O Substitution; equation Il can be solved for x in one step by subtracting 3y from both sides,

In pqr the obtuse angle is 105 and the shorter sides measure 4 and 7 units rounded to the nearest tenth what is the area of triangle pqr

Which graph represents the given linear function 4x+2y=3

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.