Someone please HELP! Thanks so much

Mathematics

1 answer:

gavmur [86]2 years ago

8 0

Answer:

Step-by-step explanation:

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What is the equation of the line graphed below?

irga5000 [103]

Answer:

y=-7/2x - 2

Step-by-step explanation:

The slope is heading downwards so we know it is negative, for every two units moved on the x axis the y axis moves by 7 units. The starting point is -2

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2 years ago

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It takes Amy twice as long to deliver papers as it does Nancy. How long would it take each girl to deliver the papers by herself

ANEK [815]

Answer:

so if it takes twice all long for amy as nacy that means

Amy takes 2/3 or 0.6(aprox)

Nacy takes 1/3 or 0.3(aprox)

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2 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>

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