Answer:
Cost of small box = $13
Cost of large box = $18
Step-by-step explanation:
Let the cost of small box of candy = $s
And the cost of large candy box = $b
Beth sold 9 small and 10 large boxes of candies for $297.
9s + 10b = 297 -----(1)
Sarah sold 8 small and 5 large boxes of candies for $194.
8s + 5b = 194 -------(2)
Multiply equation (2) by 2 then subtract equation (1) from (2).
2(8s + 5b) - (9s + 10b) = (2×194) - 297
16s + 10b - 9s - 10b = 388 - 297
7s = 91 ⇒ s = $13
From equation (2),
(8×13) + 5b = 194
104 + 5b = 194
5b = 90
b = $18
Answer:
The student is incorrect.
Step-by-step explanation:
When you add the absolute value lines around a negative number, it becomes a positive number. If you add them to a positive number, it stays positive. Since the student added them to -9, the number would become 9 which if greater than 4.
What are the math problems?
Answer:
That is probably tellurium 134 which has a half-life of 41.8 minutes but we'll stick with the 40 minutes you stated.
240 / 40 minutes equals precisely 6 half-lives.
Every half-life reduces a radioactive substance by one half.
So 6 half-lives reduces it by 1 / (2^6) which equals 0.015625
576 * .015625 = 9 grams exactly.
Step-by-step explanation:
Answer:
720
Step-by-step explanation:
you just need to multiply