Answer:
Step-by-step explanation:
b=boy
a= a on the exam
b=15
b∩a=6
b'∩a=3
b'∪a'=?
b'∪a'= b'+a'-b'∩a'
a= b∩a+b'∩a (law of total probability) = 9
a'= 25-9 = 16
b'= 25-15= 10
16+10-7=19
19/25= .76
Answer:
3*3*3*3*3
Step-by-step explanation:
Answer:
Option A, 19
Step-by-step explanation:
<u>Step 1: Find how many students are less than 69 inches</u>
65" + 66" + 67" + 68"
1 + 1 + 9 + 8
19
Answer: Option A, 19
Answer:
Tamara incorrectly factored the whole expression.
Step-by-step explanation:
Note that
•21x=3·7·x;
•56xy=2·2·2·7·x·y.
Mark in bold all common factors, then GCF(21x,56xy)=7·x=7x.
Thus,
21x+56xy=7x(3+8y).
Hence, Tamara correctly found the GCF of numbers 21 and 56, but incorrectly factored the whole expression.
4 nickels and 5 pennies.
5 nickels and 0 pennies
