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Natalija [7]
2 years ago
9

An element with a mass of 130 grams decays by 22% per minute. How much of the element is remaining after 7 minutes, to the neare

st 10th of a gram?
Mathematics
1 answer:
In-s [12.5K]2 years ago
8 0
I think you meant to put this problem into the chemistry category. This is the mathematics category.
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Describe two different ways to solve: -10=1/4(8y-12)
timurjin [86]
There are two ways to approach this question. The first is to divide both sides of the equation by 1/4, which is the same as multiplying by 4.
4*(-10)=4*(1/4)(8y-12)
-40=1(8y-12)
-40=8y-12
-40+12=8y-12+12
-28=8y
-28/8=8y/8
-3.5=y
Another method is to distribute 1/4 to each term within the parentheses.
-10=8y*(1/4) - 12*(1/4)
-10=2y - 3
-10+3=2y - 3 +3
-7=2y
-7/2= 2y/2
-3.5=y
I hope this is helpful!
3 0
3 years ago
A brand of uncooked spaghetti comes in a box that is a rectangular prism with a length of 11 inches, a width of 3 inches, and a
iragen [17]

Area = 1/2((11+3)×4.5) = 31.5 inch squared

7 0
2 years ago
Which statement best describes (3 x 4 x6 = 3 x (4 x 6)
Ratling [72]

Answer:

The given statement is,

(3 * 4) * 6 = 3(4 * 6)

To find (3 * 4) * 6

(3 * 4) * 6 = 12 * 6 = 72

To find 3(4 * 6)

3(4 * 6) = 3 * 24 = 72

Step-by-step explanation:

The result of these two expression is same.

Therefore we can conclude that,

Therefore the correct answer is,

The grouping of the factors is changed but the product is the same.

BRAINLIEST ME PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE

7 0
2 years ago
Joey puts 25% of his allowance into savings each week. If last week he put 10$ in savings, what was his allowance last week?​
GrogVix [38]

Answer:

$40

Step-by-step explanation:

25% is 1/4.

If 10 is 1/4 of the full amount, then you take 10 and multiply by 4 to get the full amount.

10 times 4 equals 40.

7 0
2 years ago
Someone please help.​
brilliants [131]

Answer: 3,19 which is larger than the original

Step-by-step explanation: if you consider that the original average is 3 you can say that all 25 students have 3 siblings so the average is 3, if you add another students with 8 siblings and do some math (25*3+8)/26 its 3,19

8 0
2 years ago
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