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Veseljchak [2.6K]
3 years ago
7

Twice a number, decreased by nineteen

Mathematics
2 answers:
anzhelika [568]3 years ago
5 0
2n-19 I think is the answer :3
sasho [114]3 years ago
5 0
2x-9 just as the other one said I prefer to use x as a variable when they say of a number I learned this last month it is rly easy once you get used to it
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Solve the question and check the solution. Express numbers as integers or simplified fractions. 5(m+5)=7m+9
Yanka [14]

Answer:

m = 8

Step-by-step explanation:

5(m+5)=7m+9   (distribute & evaluate parenthesis)

5(m)+5(5)=7m+9

5m + 25 = 7m + 9  (move all m-terms to one side and constants to the other)

5m - 7m = 9 - 25  (evaluate both sides)

-2m = -16 (divide both sides by -2)

m = (-16) / ( -2) = 8

7 0
3 years ago
Si una galleta de chocolate aporta un aproximado de 150 kcal y un viaje en bicicleta se quema por media hora se que mas 340 kcal
Elanso [62]

Answer:

Una persona necesitará 2 horas y 30 minutos de viaje en bicicleta para quemar el contenido kilocalórico de cinco galletas.

Step-by-step explanation:

De acuerdo con este problema, la cantidad de calorías que se quema es directamente proporcional al tiempo de viaje en bicicleta. Si sabemos que una galleta aporta 150 kilocalorías, entonces 5 galletas equivalen a 750 kilocalorías.

Por regla de tres simple calculamos el tiempo requerido para quemar 750 kilocalorías:

x = 30\,min \times \frac{750\,kcal}{150\,kcal}

x = 150\,min

Es decir, una persona necesitará 2 horas y 30 minutos de viaje en bicicleta para quemar el contenido kilocalórico de cinco galletas.

6 0
3 years ago
Find x. <br> 30 <br> 20 <br> Need help with this question asap
Molodets [167]
Cos=adjacent/hypotenuse
Cos30=x/20
x=cos30 *20

Sorry I don’t have a calculator right now
6 0
3 years ago
Read 2 more answers
Simplify the ratio fully<br> 24:78
olya-2409 [2.1K]

Answer:

4 : 13

Step-by-step explanation:

Divide both numbers by 6

8 0
2 years ago
Read 2 more answers
Help please!!!!! THIS IS URGENT
FromTheMoon [43]

Answer:

There will be $22,800 left after 6 years

Step-by-step explanation:

4% every year after 6 years = 24% be taken out of 30,000

24% of 30,000 = 7200 so you'll have 22,800 left.

5 0
3 years ago
Read 2 more answers
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