Answer:
true
Step-by-step explanation:
it shows that the students buy those pencils
Step-by-step explanation:
the solution is found in the images above
Answer:
100
Step-by-step explanation:
It will help in the future to memorize your time tables
10*10 is basically 10 plus 10, 10 times but in a easier form
10+10+10+10+10+10+10+10+10+10=100
10+10=20
20+10=30
30+10=40
40+10=50
50+10=60
60+10=70
70+10=80
80+10=90
90+10=100
A+b=13
a-b=7
add the two equations using system of equations
2a=20
a=10
10+b=13
b=3