24-03-2021
Mathematics

contestada

If a + b = 5 and 3a + 2b = 20, then what is 3a + b equal to?

Respuesta :

24-03-2021

Answer:

17.5

Step-by-step explanation:

3a = 15

a =5 .

3 x 5 = 15

2b = 5

15 + 5 = 20

----------------------------

b = 2.5

2.5 ( B ) + 15 ( 3a ) = 17.5

Answer Link

Otras preguntas

A bag contains 3 red marbles, 1 green one, 1 lavender one, 3 yellows, and 2 orange marbles. How many sets of five marbles include at most one of the yellow ones

Solve the equation 2/3x - 5 = 1/2x - 3

what are two reasons why population distribution and density patterns are useful to understand

Multiple Choice: A small amplitude transverse wave is travelling on a string. The frequency of the wave is suddenly doubled. Which one of the following is a tru

good thesis statement on rumors any suggestions pls thank you

How do you ask to use the washroom in french?

U.S. Groups of the Late 1700s and Early 1800s Women Children Indentured Servants Native Americans African Americans Working Class Why did all of the groups list

use a sum or difference identity to find an exact value of sin 2pi over 12

in the english parliamentary system what is the executive called

Could someone please tell me how to do elimination and substitution method. Please show examples and fully explain how you did it. Thank you :)