Find the first term and the common difference.$6.16, $9.67, $13.18, $16.69, . . .
A. a1 = $6.16, d = $3.51
B. a1 = $6.16, d = $10.53
C. a1 = $6.16, d = $6.16
D. a1 = $6.16, d = $2.63
Answer: A
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Convert the given unit of measure to the measure shown.19.90 millimeters to meters
A. 19,900 meters B. 0.199 meter C. 0.0199 meter D. 1990 meters
Solve the problem.The percentage of households that mailed back Census forms for various years are listed in the table below. The Census occurs every ten years. 
?Let f(t) represent the percent of households that mailed back Census forms at t years since 1980.i) Find an equation for f following a square root model. Round to the nearest integer.ii) Use your model to predict the percent of households that will mail back Census forms in 2020.iii) Use your model to predict when half of households will mail back Census forms.
What will be an ideal response?
Write the sentence as an equation. Use x to represent "a number."If six times a number is increased by 9, the result is 51.
A. 6(x + 9) = 51 B. 9(6 + x) = 51 C. 9x + 6 = 51 D. 6x + 9 = 51
Solve. Try factoring first. If factoring is not possible or is difficult, use the quadratic formula.
+ 
= 
A. 
B. 
C. 
D. 