Mathematics: Leon needs to save more than $350 to buy a new bike. He has $130 saved so far, and he plans to save $20 each week until he has enough. The inequality below represents x, the number of weeks he must save to have the extra money needed. 130 + 20 x greater-than 350 Which best describes the number of weeks he must save before he can buy his bike? He must save for 11 or more weeks. He must save for 12 or more weeks. He must save for 24 or more weeks. He must save for 25 or more weeks.

Leon needs to save more than $350 to buy a new bike.

Ответ:

pierreangie17

07.02.2022

Mathematics

He must save for 11 or more weeks.

Step-by-step explanation:

Using the inequality, we will solve for x to determine the number.

130 + 20x > 350 Subtract 130 from both sides

-130 -130

20x > 220

x> 11

Since x is greater than 11, it means that if he saves for 11 weeks, then he will save the exact amount of $350, but since he wants to save more, he must save for 11 or more weeks.

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Ответ:

arletsolis23p2cjls

18.11.2020

Mathematics

$\large\boxed{1.\overline{21}=\dfrac{40}{33}}$

Step-by-step explanation:

$x=1.\overline{21}\\\\x=1.212121...\qquad\text{multiply both sides by 100}\\\\100x=121.212121...\\\\\text{subtract x from 100x}\\\\100x-x=121.212121...-1.212121...\\\\99x=120\qquad\text{divide both sides by 99}\\\\x=\dfrac{120}{99}\\\\x=\dfrac{120:3}{99:3}\\\\x=\dfrac{40}{33}$

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