143220 pencils
55 days
7 schools
124 pencils per case
143220 / 124 = 1155 total cases
1155 / 55 = 21 cases per day
21 / 7 = 3 cases per school per day
January has 31 days
31 * 3 = 93 cases were delivered each day
So the distance formula is 
. Using this, our equation is 
and we can solve for it as such:
As we see with this radical, the sum that's under it is 15^2 + 8^2, or the third option.
4y+7x-3y+2x
(7x+2x)+(4y+-3y)
=9x+y
Answer:
Phrase : "the product of 19 and a number"
Mathematical expression : 19A
Step-by-step explanation:
Phrase : "the product of 19 and a number"
The product of two numbers a and b can be written as a x b =ab
<u>To find Mathematical expression
</u>
Let A be a number,
The product of number with 19 can be written as
19 x A = 19A
Therefore the given phrase "the product of 19 and a number" as a mathematical expression =19A
