Answer:
3
Step-by-step explanation:
we know that product do extreme is equal to the product of means
105:280::x:8
105*8=280x
840=280x
x=840/280
x=3
Answer: Van: 10, Bus: 46
Step-by-step explanation:
Let the number of students in each van be represented by v.
Let the number of students in each bus be represented by b.
The question given can be formed into an equation as:
3v + 13b = 628 ...... i
9v + 2b = 182 ......... ii
Multply equation i by 9
Multiply equation ii by 3
27v + 117b = 5652 ........ iii
27v + 6b = 546 ....... iv
Subtract iv from iii
111b = 5106
b = 5106/111
b = 46
Bus = 46
Recall that 9v + 2b = 182
9v + 2(46) = 182
9v + 92 = 182
9v = 182 - 92
9v = 90
v = 90/9
v = 10
Van = 10
7 x 4 = 28; 28 divided by 2 = 14cm squared
12
3/100 = 0.03
0.03x400 = 12
12 dolls are recycled per hour
