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Naya [18.7K]
2 years ago
5

Which of the following represents a valid first step to solving this system of equations using the substitution method?

Mathematics
1 answer:
Phoenix [80]2 years ago
7 0

Answer:

2(2y - 1) - y = 7

Step-by-step explanation:

I guess the 2 equations are

2x - y = 7

x = 2y - 1

substitution message that you use one equation to express one variable by the other, and then you use that in the other equation to get one equation for one variable. then you solve for that, and use that result in the first equation to since for the second variable.

the equations are already defined that way, that the second equation directly defines x as an excision of y.

so, this needs to be used then in the first equation.

and that makes

2(2y - 1) - y = 7

the correct first step.

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Eight packages of strawberries cost $24. How many packages can you buy for $12
romanna [79]
4 packages, because 24/12=2, 8/2=4 packages.
8 0
4 years ago
Help me plz I don't understand this
KiRa [710]

Answer:

C) 6:1

Step-by-step explanation:

The second number must be a one.  To do that, it would have to be multiplied by 4.  That means we have to multiply the first number by 4 also:

3/2*4=6

So it’s 6:1

6 0
4 years ago
Which equation is a function of x? x = 5 x = y squared 9 x squared = y x squared = y squared 16
natita [175]

The equation which is a function of x is x²=y.

Given an equation that is a function of x.

A function may be a relation between a collection of inputs and a collection of permissible outputs with the property that every input is said to precisely one output.

If we input a value of x then we get the output f(x) = y, which is the function of x.

We are given four options out of which we are to pick the one which may be a function of 'x'.

The first option is x=5 in which no term of y is included and its a constant. So, option 1 is not correct.

The second option is x=y²+9 in which y contains a power 2. So, option 2 is not correct.

The third option is x²=y in which y contains power 1. So, option 3 is correct.

The fourth option is x²=y²+16 in which y contains a power 2. So, option 3 is not correct.

Hence, the equation which is a function of x is x²=y.

Learn about functions from here brainly.com/question/16614909

#SPJ4

4 0
2 years ago
19. Find x:<br> € (17x-7)*<br> G<br> 19<br> HELP W ALL 3 !!
blsea [12.9K]

Answer:

24

(17x-7)

x = 7 + 17

x = 24

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7 0
3 years ago
PLEAZE THIS NEEDS TO BE QUICK
sesenic [268]
Para lá lá no debes de inglês e o de inglês
3 0
3 years ago
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