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

Is glass biotic or abiotic

if W = {positive integers} and subset Z = {positive integers divisible by 5}, what is Z′? {1, 2, 3, 4, …} { } {5, 10, 15, 20, …} {1, 2, 3, 4, 6, 7, 8, 9, 1

how do i solve this. a-12=-34

Find the least common denominator (LCD) for the fractions. 1/6 and 3/10 A. 2 B. 10 C. 30 D. 60

A 90-kg tight end moving at 9.0 m/s encounters at 400 N•s impulse. Determine the velocity change of the tight end.

6) Lunch furnishes 8 mg of the minimum daily requirement (MDR) for iron, while the other meals furnish 10 mg of the MDR. Write the ratio (in lowest terms) of th

What range of latitude does south America span?

what is the answer [tex]5x(4x+3)=24[/tex]

Shaunda said that buying 4 towels for $17nwas better buy than buying 2 towels for $9. She found her answer by doubling the terms in the ratio 9:2 and comparing

thermosoftening polymers can be used to make plastic bottles and food packaging 1) the reaction to produce polymers uses a catalyst why does the catalyst wor