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Diana’s scores on the first 4 tests in her biology class were 85, 97, 92 and 78. How many points must Diana score on a fifth test to average exactly 90 points for these 5 equally weighted tests?CorrectIncorrect
In isosceles triangle ABC, angle B and angle C are congruent and the measure of angle A is 98º. What is the measure of angle B?CorrectIncorrect
For what value of b is x = -2 a solution of x² + 8x + b = 0?CorrectIncorrect
What is the slope of any line parallel to the line 6x – 5y = 7?CorrectIncorrect
In the right triangle shown in the diagram, a leg is 2 meters long and its opposite acute angle measures 53º. About how many meters long is the hypotenuse?
(Note: sin53º = 0.80
cos53º = 0.60
tan53º = 1.33)CorrectIncorrect
The graph of x²/64 + y²/16 = 1 has an x-intercept at which of the following points?CorrectIncorrect
A bowling alley offers two plans, A and B, for customers who want to pay for lane use on a monthly basis. Plan A charges an initial value of $18 a month, plus $1.75 for each hour spent bowling. Plan B charges an initial value of $22 a month, plus $1.50 for each hour spent bowling. Jeff calculates the total hours he spends at the bowling alley and finds that no matter which plan he chooses, he ends up paying the same amount at the end of the month. How many hours does Jeff spend at the bowling alley a month?CorrectIncorrect
[Calculator Allowed] If a gazelle has an average speed of 60 km/hr with a top speed of 90 km/hr, and a sloth has an average speed of 9 cm/min with a top speed of 15 cm/min, how many times faster is the top speed of the gazelle than that of the sloth?CorrectIncorrect