Solve the problem.A telephone costs $355. If the sales tax rate is 7%, how much tax is charged and what is the total price? Round your answers to the nearest cent.
A. $21.30, $376.30
B. $248.50, $603.50
C. $28.40, $383.40
D. $24.85, $379.85
Answer: D
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A line passes through the points src="https://sciemce.com/media/3/ppg__cognero__Section_3.1_The_Geometry_of_Lines__media__98d4b864-ee27-479b-bb4f-6a4bde638471.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_d3747506c99d4618b96653cd7" /> lie on the line?
and 
. For what ?y value does the point
?
A. 
B. ?
C. ?
D. ?
Divide and, if possible, simplify.
÷ (x2 - 5x + 4)
A. (x + 1)2
B. 
C. (x - 4)2
D. 
Solve the problem.The amount of a certain radioactive isotope present at time t is given by 
grams, where t is the time in years that the isotope decays. The initial amount present is 400 grams. How many grams remain after 20 years? Round to the nearest hundredth.
A. 234.78 g B. 397.87 g C. 681.48 g D. 379.25 g
Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.Eight times a number added to -7, subtracted from twice the sum of eight times the number 
A. 8(x - 7) - (2 + 8)(x - 6); 4 - 2x B. (-7 + 8x) - 2(8x - 6); 5 - 8x C. 2(8x - 6) - (-7 + 8x); -5 + 8x D. (2 + 8)(x + -6) - 8(x - 7); -4 + 2x