Maths-
SAT
Easy
Question
Which of the following expressions is equivalent to 
- 4|x|
- 8|x|
- 16x
The correct answer is: 4|x|
Related Questions to study
maths-
y = 5x+ 1
y = x2+ 3x + 2
What is the y-coordinate of the point of intersection, in the xy-plane, of the graphs of the equations above?
y = 5x+ 1
y = x2+ 3x + 2
What is the y-coordinate of the point of intersection, in the xy-plane, of the graphs of the equations above?
maths-sat
maths-
Which of the following equations has a graph in the xy-plane with no x-intercepts?
Which of the following equations has a graph in the xy-plane with no x-intercepts?
maths-sat
maths-
wxy + xyz = wx + yz
In the equation above, w, x, and z are each greater than 1. Which of the following is equivalent to y ?
wxy + xyz = wx + yz
In the equation above, w, x, and z are each greater than 1. Which of the following is equivalent to y ?
maths-sat
maths-
In the right triangle above, the tangent of 
A is 
. What is the sine of B ?
In the right triangle above, the tangent of A is . What is the sine of B ?
maths-sat
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|
|
Number of plants |
||
|
Regressed |
Thrived |
Total |
|
| A |
80 |
120 |
200 |
|
B |
140 |
60 |
200 |
|
|
Number of plants |
||
|
Regressed |
Thrived |
Total |
|
| A |
80 |
120 |
200 |
|
B |
140 |
60 |
200 |
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maths-
If x + y = 13 and x - y = 2, what is the value of x2 -y2 ?
If x + y = 13 and x - y = 2, what is the value of x2 -y2 ?
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maths-
A sample of seawater is 3.5% salt by mass and contains 1,000 grams of salt. Which of the following is closest to the mass, in grams, of the sample of seawater?
A sample of seawater is 3.5% salt by mass and contains 1,000 grams of salt. Which of the following is closest to the mass, in grams, of the sample of seawater?
maths-sat
maths-
|
x |
g(x) |
|
-1 |
-2 |
|
0 |
2 |
|
1 |
0 |
|
2 |
-1 |
|
3 |
1 |
|
x |
g(x) |
|
-1 |
-2 |
|
0 |
2 |
|
1 |
0 |
|
2 |
-1 |
|
3 |
1 |
maths-sat
maths-
A chef plans to cook a maximum of 100 entrees for a dinner party; each entree will include either chicken or fish. The cost of ingredients for each chicken entree is $7, and the cost of ingredients for each fish entree is $9. If no more than $850 can be spent on ingredients for the entrees and the chef cooks c chicken entrees and f fish en trees, which of the following systems best represents the constraints
on c and f?
A chef plans to cook a maximum of 100 entrees for a dinner party; each entree will include either chicken or fish. The cost of ingredients for each chicken entree is $7, and the cost of ingredients for each fish entree is $9. If no more than $850 can be spent on ingredients for the entrees and the chef cooks c chicken entrees and f fish en trees, which of the following systems best represents the constraints
on c and f?
maths-sat
maths-
A biologist grows a culture of bacteria as part of an experiment. At the start of the experiment, there are 75 bacteria in the culture. The biologist observes that the population of bacteria doubles every 18 minutes Which of the following equations best models the number, n, of bacteria t·hours after the start of the experiment?
A biologist grows a culture of bacteria as part of an experiment. At the start of the experiment, there are 75 bacteria in the culture. The biologist observes that the population of bacteria doubles every 18 minutes Which of the following equations best models the number, n, of bacteria t·hours after the start of the experiment?
maths-sat
maths-
For the function f above, what is the value of f(7) - f(5)?
For the function f above, what is the value of f(7) - f(5)?
maths-sat
maths-
Median Ages of Populations of Selected Countries, 2012
|
Country |
Median age of population (years) |
| Brazil China Germany India Indonesia Nigeria Philippines Russia United States |
29.6 35.9 45.3 26.5 28.5 17.9 23.1 38.8 37.7 |
Median Ages of Populations of Selected Countries, 2012
|
Country |
Median age of population (years) |
| Brazil China Germany India Indonesia Nigeria Philippines Russia United States |
29.6 35.9 45.3 26.5 28.5 17.9 23.1 38.8 37.7 |
maths-sat
maths-
A polling agency wanted to test whether a ballot measure would pass with greater than 50% yes votes. The agency sampled 1,000 registered voters selected at random, and 50.6% of the voters favoured the ballot measure. The margin of error associated with this poll was ±3%. Based on the poll's results, which of the following statements must be true?
A polling agency wanted to test whether a ballot measure would pass with greater than 50% yes votes. The agency sampled 1,000 registered voters selected at random, and 50.6% of the voters favoured the ballot measure. The margin of error associated with this poll was ±3%. Based on the poll's results, which of the following statements must be true?
maths-sat
maths-
The scatterplot above shows the average fuel economy for a certain class of cars driving at 12 different speeds. The graph of a quadratic model for the data is also shown.
For what fraction of the 12 speeds does the model overestimate the average fuel economy?
The scatterplot above shows the average fuel economy for a certain class of cars driving at 12 different speeds. The graph of a quadratic model for the data is also shown.
For what fraction of the 12 speeds does the model overestimate the average fuel economy?
maths-sat
maths-
The scatterplot above shows the average fuel economy for a certain class of car driven at 12 different speeds. The graph of a quadratic model for the data is also shown.
The quadratic model predicts the average fuel economy to be 26 miles per gallon for how many different speeds?
The scatterplot above shows the average fuel economy for a certain class of car driven at 12 different speeds. The graph of a quadratic model for the data is also shown.
The quadratic model predicts the average fuel economy to be 26 miles per gallon for how many different speeds?
maths-sat
