Answer: download the app photomath it will help give you answers
Step-by-step explanation:
Answer:
729
Step-by-step explanation:
1/3^-2×3^-4×(-1)^2
=3^2×3^4/1
=9×81
=729
The total pages in the book are 510.
Step-by-step explanation:
Lets say, the total pages are x
Mo read the book with following proportion.
Monday: 2/5.x
Pages left: 1.x - 2/5.x = 3/5.x
Tuesday: 1/2.x of 3/5.x = (1/2.x) . (3/5.x) = 3/10.x
Pages left: 3/5.x - 3/10.x = 3/10.x
Wednesday: 5/9.x of 3/10.x = (5/9.x) . (3/10.x) = 1/6.x
Thursday : ?
Lets say the total proportion is 1. The proportion of book read on Thursday can be calculated as:
1.x - 2/5.x - 3/10.x - 1/6.x = 2/15.x
Also given, Mo read 68 more pages on Tuesday than Wednesday.
Therefore,
3/10.x - 1/6.x = 68
2/15x = 68
x = 510
Therefore, the total pages in the book are 510.
Answer:
1. 3.75 or 3/4
2. 5.3
3. 4.5
4. 3.4
Step-by-step explanation:
hope this helped i tried :/
To start, determine the amount of time needed to finish the book. Do this by multiplying the amount read at 45 minutes by the total time to read the book (x) and setting it equal to the time read, 45 minutes. This gives you (2/5)x=45. Next, solve for x. (2/5)x=45, multiply both sides by 5, 2x=225, divide both sides by 2, x=225/2 minutes to read the whole book. Now, divide your new time, 70 minutes, by the total time to read a whole book. This gives you 70/(225/2), which you would multiply the top by the reciprocal of the bottom, giving you 70*(2/225), now, you multiply the numerators by each other and the denominators by eath other, getting (70*2)/(1*225)=140/225. Now, you simplify, first by dividing each by 5, 28/45, which is the most simplified it could be. This makes your answer 28/45 of the book read in 70 minutes.