3 years ago

2x + 4y = 14 and 3x – 4y = -39 solve by elimination

Mathematics

1 answer:

gizmo_the_mogwai [7]3 years ago

5 0

Answer: x=-5 and y=6

Step-by-step explanation: i hope i did it right tell if i didnt

You might be interested in

A tortoise travels 2/12 miles per hour describe two different methods to determine the number of miles it will take to walk 3 2/

suter [353]

Answer:

11/18 miles

Step-by-step explanation:

3 2/3=11/3

2/12=1/6

1/6*11/3=11/18

7 0

3 years ago

Please answer the question. The picture is right below.

zhenek [66]

Hey man I’ve never seen nothing like this but I’d you’re doing math on ap classroom , man , GOOD LUCK

5 0

3 years ago

Ana can finish a certain job in 10 hours. Together, Ana and Nina can finish the same job in 3 hours. How many hours can Nina fin

Over [174]

Answer: 4.5 hours

<u>Step-by-step explanation:</u>

$Ana: \dfrac{1}{10}\ \text{job per hour}\\\\Nina: \dfrac{1}{x}\ \text{job per hour}\\\\Together: \dfrac{1}{3}\ \text{job per hour}\\\\\\Ana + Nina = Together\\\dfrac{1}{10}\quad +\dfrac{1}{x}\quad =\quad \dfrac{1}{3}\\\\\\\dfrac{1}{10}(30x)+\dfrac{1}{x}(30x) =\dfrac{1}{3}(30x)\\\\\\\rightarrow\quad 3x+30=10x\\\\.\quad 3x+30=10x\\\underline{-3x\qquad \quad -3x\quad}\\.\qquad \quad 30=7x\\\\.\qquad \quad \dfrac{30}{7}=\dfrac{7x}{7}\\\\\\.\qquad \quad \dfrac{30}{7}=x$