98 points pls will give brainliest
solve
how many gallons of a 70% antifreeze solution must be mixed with
80 gallons of 30% antifreeze to get a mixture that is 60% antifreeze? use the six-step method.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?

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.