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2 years ago

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:

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

5 0

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