Answer:
Step-by-step explanation:
d=2q, q=d/2
10d+25q=630, using q=d/2
10d+25d/2=630
20d+25d=1260
45d=1260
d=28
So he has 28 dimes.
Answer:
answer is 27 hope it helps
There are 80 children. 45 of them are girls. The amount of boys is equal to:

That means there are 45 girls and 35 boys.
The ratio of boys to girls is: 
Simplify:

Your answer is 7:9
Answer: No
Step-by-step explanation:-
Labeled diameter on the bolt = 0.35 inch
The observed diameter of the bolt= 0.33 inch


For the bolt to be in the package, the percent error must be less than 5%. As the percent error is 6.06% which is greater than 5%, the bolt cannot be in the package.