module 23
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 5^x=125 | Rewrite equation so 125 is expressed as a power of 5. 5^x=5^3. Therefore x=3
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| 81^x-1=9^3x | Write 81 & 9 as powers of 3. (3^4)^x-1=(3^2)^3x. simplify 3^2x-2=3^9x. Put the exponents to equal 2x-2=9x and then solve for x.
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| y=240(2x7) | Plug in the numbers you know. 30=t. Multiply 0.015 and 30 which equals 0x45. Then take 2.7 ^0.45 power 1.56. the answer comes to 375.
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| 16^x=32 | x=5/4
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| Find the amount Tom owes at the end of 4 years if $5200 is loaned to her at a rate of 5% compounded monthly. | $6348.66 use A=P(1+r/n)^nt P=$5200 r=5%=0.05 t=4
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| Graph y=7^x | Get ordered pairs by making a x,y chart. Using 0, -1, 1. you get (0,1)(-1,1/7)(1,7). Then graph the points and draw a line through them.
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| 625^x=3125 | x=5/4
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| 27^x-1=81^3x | x=-1/3
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| 3^x=81 | x=4
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| 125^x=625 | x=4/3
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
samanthazerilli
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