Answer:
She sent 8 more postcards last week.
Step-by-step explanation:
Consider the provided information.
Megan sent 12 postcards last week. This week she sent 4 postcards.
We need to find How many more postcards did she sent last week?
To find this simply subtract the numbers as shown:
12-4 = 8
Hence, she sent 8 more postcards last week.
x-3
x representing the amount of money on the gift card
The mean is and standard deviation is . Then the variable .
Use substitution , then the variable .
The probability can be calculated in the following way:
for X=80, and . From the diagram .
Conclusion: if 188 students take the exam, then 188·0.84=157.92 (157) would receive a score above 80
30 + 6
the product of 9 & 4 is 36,
so, 30 + 6 is 36.
ok