3 years ago

Help me please quickly

Mathematics

2 answers:

pshichka [43]3 years ago

8 0

The first one is correct

dmitriy555 [2]3 years ago

6 0

Answer: first one

Step-by-step explanation:

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Pls help, i'll give you a brainliest 4 answer <3

babymother [125]

Answer:

$x = 45 \ \& \ y = 5$

Step-by-step explanation:

The system of linear equations in two variables is ,

$\begin{cases} x = 9y \cdots (i)\\ x - 5y = 20\cdots (ii) \end{cases}$

We can easily solve out this Question using substitution method . For that , substituting x = 9y from equation (i) to equation (ii) , we have ,

$\implies x - 5y = 20 \\\\\implies 9y - 5y = 20 \\\\\implies 4y = 20 \\\\\implies y =\dfrac{20}{4}\\\\\implies\boxed{\boxed{ y = 5 }}$

Substituting this value in (i) ,

$\implies x = 9y \\\\\implies x = 9\times 5 \\\\\implies \boxed{\boxed{ x = 45 }}$

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3 years ago

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The property taxes on a home varies directly with the value of the home. Jack currently lives in a home worth $172,000 and pays

padilas [110]

Okay, where is your question?

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6. Sarah counted her heartbeats after running. In 20 seconds, she counted 45 heartbeats. At that rate, what was her number of he

borishaifa [10]

20×3 is 60 and if Sarah counted 45 beats in 20 seconds you'd multiply 45 by 3 so it would be 135.

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Lesechka [4]

Answer:

180

Step-by-step explanation:

5 +4 = 9

9 times 20 = 180

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3 years ago

I NEED HELP, Order the rational numbers from least to greatest.

madam [21]

Answer:

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Step-by-step explanation:

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