Practice Quiz Mode
Take all 5 MCQs in interactive quiz mode with timer and progress tracking
Which expression is equivalent to $9x^{2} + 7x^{2} + 9x^{2}$?
Difficulty: Easy
A:
$63x^{4} + 9x$
B:
$9x^{2} + 16x$
C:
$25x^{5}$
D:
$16x^{2} + 9x$
Which expression is equivalent to $\left(2x^{2}+x-9\right)+\left(x^{2}+6x+1\right)$?
Difficulty: Easy
A:
$2x^{2}+7x+10$
B:
$2x^{2}+6x-8$
C:
$3x^{2}+7x-10$
D:
$3x^{2}+7x-8$
The area $A$, in square centimeters, of a rectangular painting can be represented by the expression $w(w+29)$, where $w$ is the width, in centimeters, of the painting. Which expression represents the length, in centimeters, of the painting?
Difficulty: Medium
A:
$w$
B:
$29$
C:
$(w+ 29)$
D:
$w(w + 29)$
A quadratic function models the height, in feet, of an object above the ground in terms of the time, in seconds, after the object is launched off an elevated surface. The model indicates the object has an initial height of 10 feet above the ground and reaches its maximum height of 1,034 feet above the ground 8 seconds after being launched. Based on the model, what is the height, in feet, of the object above the ground 10 seconds after being launched?
Difficulty: Hard
A:
234
B:
778
C:
970
D:
1,014
The equation $\frac{x^{2}+6x-7}{x+7}=ax+d$ is true for all $x\neq-7$, where $a$ and $d$ are integers. What is the value of $a+d$?
Difficulty: Hard
A:
$-6$
B:
$-1$
C:
$0$
D:
$1$
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