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Questions in Grade College

📝 Answered - Select the correct answer. What is the solution to the equation? $\sqrt{x}+3=12$ A. 225 B. 81 C. 3 D. no solution

📝 Answered - Solve the formula $d=rt$ for $t$. A. $t=\frac{d}{r}$ B. $t=\frac{r}{d}$ C. $t=rd$ D. $t=d-r$

📝 Answered - Use geometry to evaluate the definite integral. [tex]\int_{-9}^0 \sqrt{81-x^2} d x[/tex]

📝 Answered - Let $| u |=4$ at an angle of $210^{\circ}$ and $| v |=9$ at an angle of $315^{\circ}$, and $w = u - v$. What is the magnitude and direction angle of $w$? A. $|w|=5.5 ; \theta=156.1^{\circ}$ B. $|w|=5.5 ; \theta=203.9^{\circ}$ C. $|w|=10.8 ; \theta=156.1^{\circ}$ D. $|w|=10.8 ; \theta=203.9^{\circ}$

📝 Answered - Roni and Allie are mowing the grass at the soccer field. Roni has a riding lawn mower and can mow the field in 30 minutes. Allie is pushing a lawn mower and can mow the field in 75 minutes. If Roni and Allie work together to mow the field, what part of the field would Roni mow? A. [$\frac{1}{30}$] B. about 0.52 of the field C. about 0.64 of the field D. about 0.71 of the field E. about 0.87 of the field

📝 Answered - Decide if the following sentence is grammatically CORRECT or INCORRECT: Este son nuestros carros.

📝 Answered - Solve: [tex]\frac{b}{-3}=-9[/tex]

📝 Answered - Simplify $-2xy + 3x - 2xy + 3x$ A. $4xy - 6x$ B. $-4xy + 6x$ C. $4xy + 6x$ D. $2xy$

📝 Answered - Which of the following has increased tensions between the United States and China in the twenty-first century? A. Cyber-espionage B. Disputes over common borders C. Chinese interference in Japan D. Rights in the Gulf of Mexico

📝 Answered - Convert 67.5 cu ft to cubic yards.