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3 years ago

Will mark brainliest.

Mathematics

1 answer:

snow_tiger [21]3 years ago

3 0

The ordered pair (- 3, 1 ) is a solution to the second equation because it makes the second equation true

To test , substitute the coordinates of (- 3, 1) into the equations and if both sides are true then it is a solution to the equation.

x - 4y = - 3 - 4 = - 7 ≠ 6 ← not true

(3 × - 3) + 1 = - 9 + 1 = - 8 ← true

Thus (- 3, 1 ) is a solution to the second equation

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Factor the trinomial below.

arsen [322]

Option C is your answer.

9x² + 6x + 1
9x² + 3x + 3x + 1
3x(3x + 1) + 1(3x + 1)

(3x + 1)(3x + 1)

5 0

2 years ago

A lamp is 36 inches ABOUT how many centimeters tall is the lamp (one inch is about 2.5 centimeters)

Viktor [21]

The lamp is about 90 cm. to get this answer you take 36 and multiply it by 2.5.

7 0

2 years ago

1. Mrs. Rodger got a weekly raise of $145. If she gets paid every other week, write an integer describing how the raise will aff

nasty-shy [4]

Answer:

Increase by $145

Step-by-step explanation:

= $ (x + 145 + 145)

= $ (x + 290)

5 0

2 years ago

Rod is paid $85 to install a screen door and $115 to install a wooden door. In one week he installed 18 doors and was paid a tot

Rainbow [258]

Answer:Rod installed 7 screen doors

Step-by-step explanation:

Step 1

Let the number of screen door = x

And the number of wooden doors = y

since he installed 18 doors , we have that

screen door + wooden doors = 18

x + y = 18------ equation 1

Also the cost to install a screen door -= $85

and to install a wooden door = $115

And he was therefore paid a total of $1850

Therefore

85x + 115 y = $1860------- equation 2

Step 2----- Solving

x + y = 18------ equation 1

85x + 115 y = $1860------- equation 2

Multiplying equation 1 BY 85

85x + 85y= 1530------- equation 3

85x + 115 y = $1860------- equation 4

subtracting from equation 1 from (2)

115y- 85y= 1860-1530

30y=330

y = 330/30 = 11

To find x

x+ y=18

x= 18-y

x= 18-11= 7

Rod installed 7 screen doors and 11 wooden doors.

8 0

2 years ago

Is √ 2/9 a rational number

Digiron [165]

Answer:

No it is not

Step-by-step explanation:

well if you see any number that is could be written as a fraction is rational. square root of 9 is 3, but in this case the square root of 2 is irrational, so it is a irrational number.

3 0

2 years ago