5272道题目5525 条题源记录 · 相同内容已合并
线性建模・解释与预测进阶
\( s=40+2t \)
The equation gives the speed s, in miles per hour, of a certain car t seconds after it began to accelerate. What is the speed, in miles per hour, of the car 3 seconds after it began to accelerate?
原库参考解析
线性建模・解释与预测进阶
In one week in 2017, a technician earned a total of $1,055 by working at her regular job and at a second job doing part-time work. The equation \( 20h+17c=1,055 \) represents this situation, where h is the number of hours worked at her regular job and c is the number of hours worked at her second job. Which of the following is the best interpretation of 20 in this context?
原库参考解析
线性建模・解释与预测挑战
A rectangle has a length that is 92 times its width. The function \( y=\left(92w\right)\left(w\right) \) represents this situation, where y is the area, in square feet, of the rectangle and \( y>0 \) . Which of the following is the best interpretation of 92w in this context?
原库参考解析
线性建模・解释与预测挑战
\( T\left(x\right)=67-8x \)
The function T estimates the temperature, in degrees Fahrenheit (°F), in a certain city one day in January, where x is the number of hours after 10 a.m. and \( 1\le x\le5 \) . According to the function, what was the estimated decrease in temperature each hour, in °F in this city during this time period?
原库参考解析
线性建模・解释与预测挑战
In one week in 2017, a technician earned a total of $900 by working at her regular job and at a second job doing part-time work. The equation \( 21h+10c=900 \) represents this situation, where h is the number of hours worked at her regular job and c is the number of hours worked at her second job. Which of the following is the best interpretation of 21 in this context?
原库参考解析
线性建模・解释与预测进阶
The graph shows the estimated boiling point y, in degrees Celsius, of a straight-chain alkane with a molecular weight of x grams per mole, where \( 1\le x\le280 \) .Which statement is the best interpretation of the point (141.32, 172.26)?
原库参考解析
线性建模・解释与预测进阶
\( 20.5x+25.75y=411 \)
Odalys ordered mulch and river rock, which cost a total of $411, for her home. The given equation represents the relationship between the number of cubic yards of mulch, x, and the number of tons of river rock, y, Odalys ordered. How much more, in dollars, did a ton of river rock cost Odalys than a cubic yard of mulch?
原库参考解析
线性建模・解释与预测进阶
The graph models the number of online newsletter subscribers at the end of every six-month period, where x is the number of six-month periods since the end of January 1992 and \( 0\le x\le4 \) . Which statement is the best interpretation of the point (1, 750) in this context?
原库参考解析
线性建模・解释与预测进阶
A marine biologist uses a linear model to estimate the weight of a blue whale after it is born. The model estimates that a certain blue whale weighs 5,910 pounds at birth and gains 10.0 pounds per hour, for 120 hours, after it is born. Based on this model, what is the estimated weight, in pounds, of this blue whale 7 hours after it is born?
原库参考解析
线性建模・解释与预测进阶
\( s=10+4t \)
The equation gives the speed s, in miles per hour, of a certain car t seconds after it began to accelerate. What is the speed, in miles per hour, of the car 5 seconds after it began to accelerate?
原库参考解析
线性建模・解释与预测进阶
Antwon's hair will grow at a constant rate from a length of 3 inches to a length of 5 inches. The equation \( 0.3t+3=5 \) describes this situation, where t is the number of months it will take for Antwon's hair to reach a length of 5 inches. Which of the following is the best interpretation of 0.3 in this context?
原库参考解析
线性建模・解释与预测挑战
While walking on a path, Maksim stopped at a water fountain. The graph shows the total distance y, in meters, Maksim had walked on the path x minutes after leaving the water fountain.
What distance, in meters, did Maksim walk on the path in the 10 minutes after he left the water fountain?
原库参考解析
