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Ymorist [56]
2 years ago
5

Eighty less than three times a number?

Mathematics
2 answers:
Ivan2 years ago
5 0

Answer:

30 x 3 - 80 is 10

Step-by-step explanation:

Savatey [412]2 years ago
3 0

Answer:

10

Step-by-step explanation:

Eight less than three times a number is 10.

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Austin had $70 dollars in his bank account. he purchased made a purchase for $83. What is the balance of his bank account?
Simora [160]
He would have -13$ In his Bank Account
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2 years ago
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Sofia takes 10mg of a medicine whose concentration in blood decreases by a factor of one half every day. Let t be the number of
bazaltina [42]

Answer:  Medication in Lexi's system on day t becomes,

L=10.625(\frac{1}{2})^{t-4}

Step-by-step explanation:

Since we have given that

Initial amount Sofia takes of a medicine = 10 mg

Concentration in blood decreases by a factor of one half every day.

So, it becomes,

S=10(\frac{1}{2})^t\\\\here,\text{ t denotes number of days}

According to question, four days later, it becomes,

S=10(\frac{1}{2})^4\\\\S=\frac{10}{16}\\\\S=0.625\ mg

We have given that Lexi takes 10 mg of the same medicine.

So, it becomes,

10+0.625\\\\10.625\ mg

Hence, Medication in Lexi's system on day t becomes,

L=10.625(\frac{1}{2})^{t-4}

3 0
3 years ago
Read 2 more answers
Berks Lanes charges $4 per game of bowling and $5 for the shoe rentals. If Roberto met his friends to play and paid for 5 games
Fofino [41]
25 $.

4 (dollars per game) x 5 (how much games) = 20.
+ 5 $ for one shoe rental.
3 0
3 years ago
Use the figure to find x
Blababa [14]

9514 1404 393

Answer:

  x = 5

Step-by-step explanation:

The given side is opposite the angle, and the unknown is the hypotenuse. The relevant trig relation is ...

  Sin = Opposite/Hypotenuse

  sin(30°) = (5/2)/x

  x = (5/2)/sin(30°) = (5/2)/(1/2) = 5/1

  x = 5

__

<em>Additional comment</em>

In this 30°-60°-90° "special" right triangle, the long leg is √3 times the short leg, so ...

  y = (5/2)√3

7 0
3 years ago
3 times the sum of 5 times a number and 4 is 7 times the difference twice the number and 5, what is the number?
Citrus2011 [14]

Answer:

x=-47

Step-by-step explanation:

3(5x+4)=7(2x-5)

15x+12=14x-35

x+12=-35

x=-47

3 0
3 years ago
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