Math

Grade 8 Common Core Math Tests Question 4

A line has a slope of 6 and a y-intercept of -10.

What is its equation in slope-intercept form?

(A)  y= 6x+10
(B)  6y = x-10
(C) y = 6x-10
(D) y= x-10
Math

Barton College Practice Placement Test Question 26

If the voltage, V, in an electric circuit is held constant, the current I, is inversely proportional to the resistance, R. If current is 120mA (milliampere) when resistance is 5 ohms, find the current when the resistance is 15 ohms.

(A) 40mA
(B) 357mA
(C) 360mA
(D) 200mA
Math

If a rectangular poster has an area of (2x^2-9x + 10) square units, which of the following could describe the dimensions of the poster?

a. (2x-2) units by (x-5) units
b. (2x-10) units by (x + 1) units
c. (2x-5) units by (x-2) units
d. (2x-1) units by (x-10) units
Math

−3x - 4y = 20
x - 10y = 16

If (x,y) is the solution to the system of equations above, what is the value of x ?

A) -14
B) -12
C) -4
D) 16
Math

Each leg of an isosceles triangle is 9 inches longer than one-half the length of the base. If the perimeter of the isosceles triangle is 146 inches, what is the length of one leg of the isosceles triangle?

a. 64 in.
b. 41 in.
c. 50 in.
d. 82 in.
Math

LEAP Practice Test Grade 8 Mathematics Session 1 Question 17

Misha asked ten different coworkers how many people and pets are living in their homes. She used the responses to create the scatter plot shown.

Which statement about the numbers of people and pets living in the homes of Misha’s ten coworkers is true?

(A) As the number of people living in the home increases, the number of pets increases.
(B) As the number of people living in the home increases, the number of pets decreases.
(C) As the number of people living in the home decreases, the number of pets decreases.
(D) There is no relationship between the numbers of people and pets living in the home.
Math

If {(3,2),(4,2),(3,1),(7,1),(2,3)} is to be a function, which one of the following must be removed from the set?

(A) (3,2)
(B) (4,2)
(C) (2,3)
(D) (7,1)
(E) none of the above
Math

The formula d = rt is used to calculate the distance an object travels over a period of time, t, at a constant rate, r. Based on this formula, what is the rate, r, in terms of d and t ?

A) r=\frac{d}{t}
B) r=dt
C) r=\frac{t}{d}
D) r=d-t
Math

LEAP Practice Test Grade 8 Mathematics Session 1 Question 22

A weather station recorded the amount of rain that fell during an 8-hour time frame using a rain gauge. The findings are recorded in the graph below.

Between which hours was the rate at which the rain fell greater than the rate at which the rain fell between hours 0 and 1?

(A) between hours 1 and 4
(B) between hours 4 and 5
(C) between hours 5 and 6
(D) between hours 7 and 8
Math

Grade 8 Common Core Math Tests Question 13

How much time will an old car take to cover a distance of 39 miles at a speed of 13 miles/hour? Express distance as a function of time.

(A) 3 hr, y =13x
(B) 3 hr, y =3x C
(C) 13 hr, y=39x
(D) 3 hr, x= 13y