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3 years ago

3x - 12 + 6x + 9?/ Help Please

Mathematics

2 answers:

Alexeev081 [22]3 years ago

5 0

9x-3 because you combine like terms

iragen [17]3 years ago

3 0

Combine like terms first

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The ratio of the interior angle measures of a triangle is 2:3:5. what are the angle measures?

In-s [12.5K]

The solution we will need to go is 2x + 3x + 5x = 180

10x = 180
x = 180/10
x = 18
2x = 36
3x = 54
5x = 90

(Just substitute that 18 on the x and it will give you the answer for the measurement of the angle measures.

5 0

3 years ago

PLS HELP ASAP!!!

scoray [572]

Answer:

y>4x+1

Step-by-step explanation:

We got two simple steps for this question:

1.Find the equation(y=mx+b):

I want to test these two points on my formula:

(0, 1), (–1, –3)

$m = \frac{y2 - y1}{x2 - x1} = \frac{1 - ( - 3)}{0 - ( - 1)} = \frac{4}{1} = 4$

so we just calculated our m and now it time for b

$y = 4x + b = = = > 1 = 4(0) + b = = = > b = 1$

So your criterion is y=4x+1

we are looking for ys greater than xs so your answer is gonna be y>4x+1

4 0

2 years ago

Find the equation of a line through (2,-4) and (-7,-4)

steposvetlana [31]

---------------------------------------------
Find slope :
---------------------------------------------
$\text {Slope = } \dfrac{-4 - (-4)}{-7-2} = \dfrac{0}{-9} = 0$

When the slope is 0, the graph is a horizontal line.

Equation of the graph is y = -4

------------------------------------------------------
Answer: y = -4
------------------------------------------------------

3 0

4 years ago

Josh reads 8 1/4 chapters in 5 1/2 hours what is the unit rate in chapters per hour

chubhunter [2.5K]

Answer:

The answer is 3/2

Step-by-step explanation:

or 1.5 in decimal

or 1 1/2 simplified

4 0

4 years ago

Kayla has a deck that measures 4 feet by 21 feet.

Flura [38]

For the area of the deck to be doubled, he should increase each dimension by 3.

<h3>How to find the dimension increase to double the area?</h3>

The deck is 4 feet by 21 feet.

She wants to increase each dimension by equal lengths so that its area is doubled.

Therefore,

initial area = 4 × 21 = 84 ft²

Hence,

The increase by equal length

width = x + 4

length = x + 21

area = 2(84) = 168 ft²

Therefore,

(x + 4)(x + 21) = 168

x² + 21x + 4x + 84 = 168

x² + 25x + 84 = 168

x² + 25x + 84 - 168 = 0

x² + 25x - 84 = 0

(x + 28) • (x - 3) = 0

x = -28 or 3

It can only be positive.

Therefore, she should increase each dimension by 3.

learn more on area here: brainly.com/question/23640960

#SPJ1

3 0

2 years ago