Answer:
a=15
Step-by-step explanation:
By pythagoras' theorem
25²=20²+a²
625=400+a² group like terms
a²=625-400
a²=225

therefore a=15
Answer:
Yes.
Step-by-step explanation:
Both yards do cost the same.
$15.00 divided by 2 is equal to 7.5.
$37.50 divided by 5 is equal to 7.5.
Therefore, both yards cost the same.
Answer:
18.66 minutes or 18 minutes 39.6 seconds
Step-by-step explanation:
23 x .19 = 4.37
23 - 4.37 = 18.66 minutes
The coffee table is $302, and the couch is $906. Divide the total price by 4 and multiply that number by three. Add the two numbers to check. Hope this helps!