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melisa1 [442]
2 years ago
8

42 more than a number a is 31

Mathematics
1 answer:
KengaRu [80]2 years ago
7 0

Answer:

42 - a = 31

Step-by-step explanation:

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Jose surveyed the length of TV commercials (in seconds). Find, to 3 decimal places, the experimental probability that a randomly
Lynna [10]

Answer:

≈0.487

Step-by-step explanation:

I think this is your full question right?

Jose surveyed the length of TV commercials (in seconds). Find, to 3 decimal places, the experimental probability that a randomly chosen TV commercial will last:

Length        Frequency

0-19                   17

20-39               38

40-59                19                    20 to 39 seconds.

60+ 20 to          4

Here is my anwer:

experimental probability = relative frequency = \frac{number of oserved occuerencies}{total number of oserved occuerencies}

Total frequencies = 17 + 38 +18 + 4 = 78

P(20 to 39s) = 38/78 ≈0.487  

6 0
3 years ago
Please help solve this. (Answer is not 80)
blondinia [14]

Answer:

70

Step-by-step explanation:

180 -(60+65) = 180 - 125 = 55

180 - (50 + 55) = 180 - 105 = 75

180 - (35 + 75) = 180 - 110 = 70

3 0
3 years ago
Read 2 more answers
Jana finished 1/4 of her homework at school and 2/3 of it before dinner how much of her homework has she finished so far
seropon [69]

Answer:

11/12

Step-by-step explanation:

1/4+2/3

1/4×3/3+2/3×4/4

3/12+8/12

8 0
3 years ago
16 is what part of 96?
vlabodo [156]

Answer:

the answer is 16.67

lol dont listen to the last answer i said im dum

4 0
3 years ago
Read 2 more answers
I am having trouble with question 7 onwards to q10 anyone mind helping/teach me?
zaharov [31]
~7)~
(3×4×5)
=1.585 + 2 + 2.322
=5.907
~8)
(3÷2÷5)
=1.585 - 1 - 2.322
=-1.737
9)3log7(2) -2log7(3) + 4log7(3) -2log7(2)
=0.356+2(0.565)
=1.486
9)x(x+2)=8
x=2
10)x/(2x+3)=1/9
9x=2x+3
x=3/7

Hope this helps
8 0
3 years ago
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