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stiks02 [169]
4 years ago
15

heather has 500 dollars in her savings account she withdraws 20 dollars per week for gas write an eqaution heather can use to se

e how many week it will take her to have a balance of 220 dollars
Mathematics
1 answer:
34kurt4 years ago
5 0
500-20x=220
I think this is right
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a game consists of randomly choosing a bag (labelled 1, 2 or 3) out of a choice of 100, and then again randomly, picking a ball
Anton [14]

Answer:

hello your question has some missing information attached below is the missing information

answer :  112 black balls

Step-by-step explanation:

Given data:

Each bag contains ; 10 balls

Total number of ball = 100 balls

<u>first: calculate the number of Black balls to be picked from the three bags</u>

From bag 1 = 0.4 * 0.35 * 10 = 1.4 balls

From bag 2 =  0.8 * 0.45 * 10 = 3.6 balls

From bag 3 = 0.3 * 0.2 * 10 = 0.6 ball

Total black balls picked = 5.6

∴ percentage of black balls picked given that each bag contains 10

5.6 / 10 * Total balls available  =  56 balls = 56% of 100 balls

Hence If the player plays this game 200 times the number of black balls he will pick = 56% * 200 =  112 balls

4 0
3 years ago
A tank contains 300 liters of fluid in which 40 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu
bonufazy [111]

Answer:

A(t) = 300 -260e^(-t/50)

Step-by-step explanation:

The rate of change of A(t) is ...

A'(t) = 6 -6/300·A(t)

Rewriting, we have ...

A'(t) +(1/50)A(t) = 6

This has solution ...

A(t) = p + qe^-(t/50)

We need to find the values of p and q. Using the differential equation, we ahve ...

A'(t) = -q/50e^-(t/50) = 6 - (p +qe^-(t/50))/50

0 = 6 -p/50

p = 300

From the initial condition, ...

A(0) = 300 +q = 40

q = -260

So, the complete solution is ...

A(t) = 300 -260e^(-t/50)

___

The salt in the tank increases in exponentially decaying fashion from 40 grams to 300 grams with a time constant of 50 minutes.

6 0
3 years ago
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Insert each of the following numbers between two consecutive multiples of 5: 13 37 48 61 93
DedPeter [7]
10 (13) 15
35 (37) 40
45 (48) 50
60 (61) 65
90 (93) 95
7 0
3 years ago
What is a unit fraction?
alisha [4.7K]

<em><u>Answer:</u></em>

<em><u>Answer:option C is correct answer of this question</u></em>

<em><u>Answer:option C is correct answer of this questionone part of a whole</u></em>

<em><u>Answer:option C is correct answer of this questionone part of a wholehope it helps</u></em>

4 0
3 years ago
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Need help with 21: thank you!!
goldfiish [28.3K]

well, im assuming its talking about a triangle. The total number of degrees is 180. I guess you subtract that by 81. You get 99. But there are still the others. Srry this is how far i can help. But you then go with 99 and divide or sum thing.

7 0
3 years ago
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