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3 years ago

Which ordered pair is a solution of the equation 2x − y = 9 (-4,1)

1 answer:

5 0

In order to confirm if which ordered pair is a solution of the given equation above, we can just simply plug in the values.
So based on my solution, the correct answer would be the third option: (5,1)
So let us try to plug in the values.
2(5) - 1 = 9
10 -1 = 9
9 = 9
So this is the correct one. Hope this answers your question.

You might be interested in

What algebraic expression represents GK?

dsp73

Answer:

Part a) GK=(7x+1)

Part b) GH=5 units and JK=8 units

Step-by-step explanation:

Part a) what algebraic expression represents GK?

we know that

GK=GH+HJ+JK

step 1

Find GH

we have

GH=GJ-HJ

substitute the given values

GH=(2x+3)-x=x+3

step 2

Find JK

JK=HK-HJ

substitute the given values

JK=(6x-2)-x=5x-2

step 3

Find GK

GK=GH+HJ+JK

we have

GH=x+3

HJ=x

JK=5x-2

substitute

GK=(x+3)+x+(5x-2)

GK=(7x+1)

Part b) If GK=15, what are GH and JK?

we know that

GK=(7x+1)

For GK=15

substitute the value of GK and solve for x

15=(7x+1)

7x=15-1

7x=14

x=2

Find the value of GH

GH=x+3

substitute the value of x

GH=2+3=5 units

Find the value of JK

JK=5x-2

substitute the value of x

JK=5(2)-2=8 units

7 0

3 years ago

What's the square root of 2 rounded to the nearest tenth ?

Alika [10]

1.40 or 1.4 would be the square root of 2

3 0

3 years ago

An antique store increases all of its prices by $40\%$, and then announces a $25\%$-off-everything sale. What percent of the ori

Mandarinka [93]

Answer:

105%

Step-by-step explanation:

We'll analyse the question one step at a time

Let the original price be x.

Let y be the 40% increase

$y =x + 40\% *x$

Express as decimal

$y =x + 0.40 x$

$y =1.40x$

Let z be the 25% off sale

$z = (1 - 25\%) * y$

Express as decimal

$z = (1 - 0.25) * y$

$z = (0.75) * y$

$z = 0.75y$

Substitute 1.40s for y

$z = 0.75*1.40x$

$z = 1.05x$

Express 1.05 as a fraction

$z = 105\% * x$

The percentage is 105%

5 0

3 years ago

What is the y-intercept of the function f(x)=4-5x

Sophie [7]

Answer:

the y intercept is 4

Step-by-step explanation:

f(x)=4-5x

rewrite

y = -5x+4

this is in the form y= mx+b where b is the y intercept

b = 4

6 0

3 years ago

3 over 5 x minus 15 = 6 over 5 x plus 12

poizon [28]

3 over 5 x minus 15 = 6 over 5 x plus 12

3/5x - 15 = 6/5x +12
-3/5x+3/5x-15=6/5x-3/5x+12 subtraction property
-15=3/5x+12 simplified
-12-15=3/5x+12-12 subtraction property
-27=3/5x simplified
(5/3)(-27)=3/5 (5/3)x multiplicative inverse
-45=x

8 0

3 years ago