21johnsonjf 21johnsonjf

14-01-2018
Mathematics

contestada

Joel bought 8 books. Some books cost $13 each and some cost $17 each. In all, he spent $128. Which system of linear equations represents the given situation?

Respuesta :

14-01-2018

If there are x $13 each books and y $17 each books, then we can build the following equations:
x + y = 8 (or y = 8 - x)
13x + 17y = 128 (or y = 128/17 - 13x/17)
:)

Answer Link

Otras preguntas

where is a metaphor in this? Friends, Romans, countrymen, lend me your ears; I come to bury Caesar, not to praise him. The evil that men do lives after them; Th

Hormones...we all have them! Using medical terminology, discuss hormones and their functions. What is their function in the human body? What diseases can affect

I need help on this question

which sequences are arithmetic?. –5, 5, –5, 5, –5, … 96, 48, 24, 12, 6 18, 5.5, –7, –19.5, –32, … –1, –3, –9, –27, –81, … 16, 32, 48, 64, 80

An example of a modern convergent boundary would be ________.

Pair of shoes cost three times as much as a scarf. The total cost of one pair shoes and one scarf is $32. If S represents the cost of one scarf, which equation

solve for x -ax + 2b > 8

Which statement about the geography of Poland is not true? Poland’s soil is less fertile in the east. Most of Poland is wooded land. Poland has many lakes near

Laurie was scuba diving. Each time she dove 5 feet deeper, she would stop and clear her ears. Each time that this totaled 20 feet deeper, she would stop and che

How do ATP and NADPH connect light-dependent and light-independent reactions in photosynthesis? A. ATP and NADPH are produced in both reactions. B. ATP and NADP