Answer:
correct answers bc and d just did it
Step-by-step explanation:
Answer:
Mean of boiling times = 26.9 seconds
Step-by-step explanation:
Times ella recorded are given as;
24.5 seconds, 23.2 seconds, 29.8 seconds, and 30.1 seconds.
Now, we want to find the mean of these boiling times.
Formula for mean is;
Mean = sum of terms/number of terms
In this question,
number of terms = 4
Sum of terms = 24.5 + 23.2 + 29.8 + 30.1 = 107.6
Thus,
Mean = 107.6/4
Mean = 26.9 seconds
Answer:
Base = 24 ft; height = 47 ft
Step-by-step explanation:
The formula for the area of a triangle is
A = ½bh
Let x = the base. Then
2x - 1 = the height
We reject the negative value, so x = 24 ft
Base = x = 24 ft
Height = 2x - 1 = 2(24)-1 = 48 - 1 = 47 ft
Check:
564 = ½ × 24 × 47
564 = 564
OK
Answer:
3 - 7
4 - 8
Step-by-step explanation:
The answer to 3 is 7 since 8.75 / 1.25 = 7
The answer to 4 is 8 since 18 / 2.25 = 8
Hope I helped you and have a great day!
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That's correct! :) Well done! (M=30)
so M-9=21
would just be 30 - 9 = 21
