Answer:176 psychology textbooks and 98 Biology textbooks were sold.
Step-by-step explanation:
Let x represent the number of psychology textbooks that were sold.
Let y represent the number of biology textbooks that were sold.
textbook store sold a combined total of 274 psychology and biology textbooks in a week. This means that
x + y = 274 - - - - - - - - - - -1
The number of psychology textbooks sold was 78 more than the number of biology textbooks sold. This means that
x = y + 78
Substituting x = y + 78 into equation 1, it becomes
y + 78 + y = 274
2y = 274 - 78
2y = 196
y = 98
x = y + 78 = 98 + 78
x = 176
7/8 miles = 49 / 56 miles so it will take the road crew 49 hours to repave the road.
Answer:
Step-by-step explanation:
Neither of them has partitioned the values correctly. The answer to the sum 3568 × 39610 =141 328 480.
They tried the partition method but did not partitioned it correctly.
3568 = 3000+500+60+8
39610 = 30000+9000+600+10
Now multiply each value of 3568 with the values of 39610. Like:
3000 * 30000
3000 * 9000
3000 * 600
3000 * 8
and so on....
There are
possible arrangements of 5 students. So, if you pick a particular one, you'll have a probability of 1/120 to guess the correct one.
Answer:
1/16
Step-by-step explanation:
The probability of getting heads with 1 coin toss is 1/2.
For 4 tosses, the probability is 1/2 * 1/2 * 1/2 * 1/2 = 1/16