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fiasKO [112]
3 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]3 years ago
6 0

Answer:

3 minutes

Step-by-step explanation:

vlabodo [156]3 years ago
5 0

Answer:

6.4

Step-by-step explanation:

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2/3x+15=17 please and thank you
frozen [14]

Answer:

x=3

Step-by-step explanation:

2/3x+15=17

first subtract 15 from both sides

2/3x=2

multiply by 3 to eliminate the fraction

2x=6

divide by 3

x=3

7 0
3 years ago
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Lori bought a shirt and a hat at half-off sale. If she spent a total of $21 on the two items, what was the original price of the
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41

Step-by-step explanation:

first you do 21×2 and that's literally it

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3 years ago
A company produces and sells widgets and gizmos. In January the company sold 350 items for a total of $9,000. If each widget sol
iren [92.7K]

Answer:

The company sold 100 widgets and 250 gizmos.

Step-by-step explanation:

Let x_1 be the number of widgets sold and x_2 be the number of gizmos sold.

We are told that the company sold 350 items. We can represent this information in an equation as:

x_1+x_2=350...(1)

We have been given that a each widget sold for $35 and each gizmo sold for $22. The company sold 350 items for a total of $9,000.

We can represent this information in an equation as:

35x_1+22x_2=9,000...(2)

From equation (1), we will get:

x_2=350-x_1

Substitute this value in equation (2):

35x_1+22(350-x_1)=9,000

35x_1+7,700-22x_1=9,000

13x_1+7,700=9,000

13x_1+7,700-7,700=9,000-7,700

13x_1=1,300

\frac{13x_1}{13}=\frac{1,300}{13}

x_1=100

Therefore, the company sold 100 widgets.

Substitute x_1=100 in equation (1):

100+x_2=350

100-100+x_2=350-100

x_2=250

Therefore, the company sold 250 gizmos.

3 0
3 years ago
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