Mathematics: I want to get at least a 90 on my next math test

Let x be the number of buses, and y the number of cars.We can solve for y in the first equation to get:Now we can replace 21-x in our second equation, and solve for x:We can conclude that 9 buses were needed for the trip....

I want to get at least a 90 on my next math test

Ответ:

marley5818

04.02.2022

Mathematics

then study well

Step-by-step explanation:

that might help, but I could help with any study questions, but I cant do test questions from the test

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Ответ:

ellathornburg

04.02.2022

Mathematics

Make sure to study any books that they give you trust me it will help

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Ответ:

sovprints

26.09.2021

Mathematics

Let x be the number of buses, and y the number of cars.
$\left \{ {{x+y=21} \atop {30x+4y=318}} \right.$
We can solve for y in the first equation to get:
y=21-x