90 ones would make 9 tens. It makes 9 tens because theres a 0 after 90. The 0 represents another place value. You can write this as 9 groups of ten
Answer:
pls I don't understand can u pls expatriate
Answer:
$243.30
Step-by-step explanation:
40.55 * 6 = 243.3
= $243.30
Answer:
The number of adults is 
Step-by-step explanation:
Let
x------> the number of children
y------> the number of adults
we know that
-------> equation A
-------> equation B
Multiply equation A by 
-------->
------> equation C
Adds equation B and equation C

54+x=12+3x
X=21 =number of classes
Total amount she will pay is $75