Mini Exam 6 — Timed Mini Exams
Practice Mini Exam 6 — Timed Mini Exams on The School of Mathematics (Timed Mini Exams) with 10 scored questions in about 15 min. This set covers problems such as: “x=-2y+9 y-x=-3 What is the value of x+y in the system of equations above?”; “If 20% of a number is 16 , then what is the value of 10% of half of the original number?”; “30% of the students in a school are seniors. If there are a total of 800 students in the school, how many s…”. Work carefully, check explanations for misses, then retake to track improvement before test day.
Questions in this quiz (10)
$$x=-2y+9$$$$y-x=-3$$What is the value of $$x+y$$ in the system of equations above?
- $$2$$
- $$4$$
- $$6$$
- $$7$$
If $$20%$$ of a number is $$16$$, then what is the value of $$10%$$ of half of the original number?
- $$8$$
- $$4$$
- $$6$$
- $$10$$
$$30%$$ of the students in a school are seniors. If there are a total of $$800$$ students in the school, how many students are seniors?
- $$180$$
- $$200$$
- $$240$$
- $$220$$
During the first year of growth, a plant’s height increases by $$25%$$. If the plant is $$h$$ inches tall after one year, which of the following expressions represents the plant’s height at the beginning of the year?
- $$0.25h$$
- $$1.25h$$
- $$\frac{h}{1.25}$$
- $$\frac{1.25}{h}$$
If $$\frac{1}{8}x+\frac{1}{4}y=10$$, what is the value of $$2x+4y$$?
- $$80$$
- $$120$$
- $$160$$
- $$180$$
Which of the following figures shows the solution of the inequality $$y$$>$$-2x+3$$?
If $$|5x-8|=72$$, what is the positive value of $$4x+7$$?
- $$35$$
- $$64$$
- $$71$$
- $$80$$
Which expression is equivalent to $$\frac{6x(x-4)-3(x-4)}{x-4}$$ where $$x\neq 4$$?
- $$6x$$
- $$6x-3$$
- $$\frac{6x-3}{x-4}$$
- $$6x^2-3x+1$$
Where is the vertex of the parabola $$y=3x^2-12x+5$$?
- $$(-2,7)$$
- $$(-2,5)$$
- $$(-2,-7)$$
- $$(2,-7)$$
According to a survey, $$40%$$ of the city’s immigrant population originated from which of the following regions?
- Asia only
- South America only
- Asia and Europe
- Europe and Africa