Evaluate.2.1 + (-6.1)
A. 8.2
B. -4
C. 4
D. -8.2
Answer: B
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Solve the problem with estimation, but do not use a calculator. Use rounding to make the resulting calculations simple.Estimate the cost to buy a refrigerator for $699, a stove for $759, and a dishwasher for $549.
A. $1800 B. $2100 C. $2000 D. $1900
Find the average rate of change for the function between the given values.f(x) = x3 + x2 - 8x - 7; from 0 to 2
A. -2
B. - 
C. -28
D. 
Find the standard deviation for the given data items. Round to 2 decimal places.10, 11, 12, 13, 14
A. 1.58 B. 0 C. 2.5 D. 1.25
Solve the problem.Linda invests src="https://sciemce.com/media/4/ppg__fdf0514192054__f1q211g6.jpg" alt="" style="vertical-align: -4.0px;" /> and 
for one year. Part is invested at 
, another part at 
, and the rest at 
. The total income from all 3 investments is 
. The combined income from the 
investments is the same as the income from the 
investment. Find the amount invested at each rate.
A. $8000 at 5%, $10,000 at 6%, $7000 at 8%
B. $10,000 at 5%, $10,000 at 6%, $5000 at 8%
C. $10,000 at 5%, $5000 at 6%, $10,000 at 8%
D. $5000 at 5%, $10,000 at 6%, $10,000 at 8%