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fiasKO [112]
2 years ago
14

An element with a mass of 890 grams decays by 19.7% per minute. To the nearest tenth of a minute, how long will it be until ther

e are 220 grams of the element remaining?
Mathematics
2 answers:
Schach [20]2 years ago
6 0

Answer:

3 minutes

Step-by-step explanation:

vlabodo [156]2 years ago
5 0

Answer:

6.4

Step-by-step explanation:

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3. In a class of 50, the # of people with brown hair is 2 more than 5 times the number of people with red hair. How many
shtirl [24]

Answer:

8 red haired and 42 brown haired

Step-by-step explanation:

I chose a random number to start off with (which is 8) and I multiplied it by 5.

8•5=40 and then you have to add 2, so you get 42.

42+8 = 50

The equation would be (5x+2)+x where 'x' is the number of people with red hair.

3 0
2 years ago
The sum of a number and five divided by fifteen
natta225 [31]

Answer:

Option F

Step-by-step explanation:

Let the number be n.

Sum of a number and 5 is n + 5.

Sum of a number and five divided by fifteen is

( n + 5 ) / 15

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2 years ago
After Halloween, a variety store had some costumes regularly priced at $20.50 on sale for 20% off the regular price. A few weeks
Diano4ka-milaya [45]
20.50 * 0.8 = $16.40

16.40 * 0.4 = $6.56

Final selling price = $6.56
6 0
3 years ago
Jill measures some scrap boards in her garage to
Alika [10]

Answer: Yes, Jill has enough scrap boards to create a border around her garden.

Step-by-step explanation:

2.75 + 3.2 + 1.65 + 2.6 = 10.2 m

7 0
3 years ago
Read 2 more answers
Which expressions are equivalent to z + (z + 6)?
katrin2010 [14]

Answer:

z=3 because in the 2(z+3) is like (z+2)+(z+6)

3 0
2 years ago
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