Last month brian made 132 mowing the neighbors lawns 68 babysitting 42 doing house hold chores and 78 walking pets estimate how much money brian earned by rounding to the nearest ten first and then roundingbthe adding numbers

300

Step-by-step explanation:

when rounding to the nearest 10,

132 is 130

68 is 70

42 is 40

and 78 is 80

add them all and it is 320

which then that could be rounded to 300.

Step-by-step explanation:

132is130,68is70,42is40,78is80, will be 320, which then that could be rounded to 300.

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walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40