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babymother [125]
3 years ago
6

What is the value of y in this system of equations?

Mathematics
2 answers:
Georgia [21]3 years ago
6 0

Answer: Y equals -6

Step-by-step explanation:

mote1985 [20]3 years ago
5 0

Answer:

-21

Step-by-step explanation:

-6x + 2y = -18.........(i)

-3x - 2y = 54...........(ii)

add equ.(ii) to equ. (i)

(-6x + [-3x]) + (2y + [-2y]) = -18 + 54

-9x = 36

x = -4

sub x= -4 into equ (i)

-6(-4) +2y = -18

24 + 2y = -18

24 +18 = -2y

42 = -2y

y = -21

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A stereo costs $418.70, including 6% sales tax. How much was the sales tax itself?
gulaghasi [49]

Answer:

25.12

Step-by-step explanation:

3 0
3 years ago
Can someone help me figure this out pls and thank you
Novay_Z [31]

\frac{13}{3} is the answer.

This is because the slop is found by the difference of ys over the difference of xs.

6 0
3 years ago
Read 2 more answers
Two trucks leave a warehouse at the same time. one travels due west at an average speed of 49 miles per hour, and the other trav
Gre4nikov [31]

Well there can be two different solutions for this but i will choose the easier one. Obviously one requires a system of equations which obviously will involve a lot of thinking and some good algebra solving in order for them to solve.

So we can just keep adding the distance as we know they are in different directions. 49 + 65 = 114. So 114 * 4.5 = 513 miles. SO after around 4.5 hours they will be 513 miles apart.

4 0
3 years ago
For 25 points
tigry1 [53]

The required domain of the inverse function is x ≤ 0. Hence option D is correct.

f(x) = -x^2

<h3>What are functions?</h3>

Functions is the relationship between sets of values. e g y=f(x), for every value of x there is its exists in set of y. x is independent variable while Y is dependent variable.

Inverse of function f(x) = -x^2
y = -x^2
x = √-y
Now,
Inverse function of f(x) is √-x
Its domain is define as less than or equal to zero.

Thus, the required domain of the inverse function is x ≤ 0.

 

Learn more about function here:

brainly.com/question/21145944

#SPJ1

6 0
2 years ago
The difference between two numbers is 31. Four times the smaller is equal to eight more than the larger. What are the numbers?
hjlf

Answer:

13 and 44

Step-by-step explanation:

let x and y be the 2 numbers with y < x , then

x - y = 31 ( add y to both sides )

x = y + 31 ( subtract 31 from both sides )

x - 31 = y → (1)

4y = x + 8 → (2)

substitute y = x - 31 into (2)

4(x - 31) = x + 8

4x - 124 = x + 8 ( subtract x from both sides )

3x - 124 = 8 ( add 124 to both sides )

3x = 132 ( divide both sides by 3 )

x = 44

substitute x = 44 into (1)

44 - 31  = y , then

y = 13

the 2 numbers are 13 and 44

3 0
2 years ago
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