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3 years ago

Select THREE expressions equivalent to - 81x + 27.

Mathematics

1 answer:

Delvig [45]3 years ago

7 0

Answer:

9(-9x+3), 27(-3x+1), -27(3x-1)

Step-by-step explanation:

If u calculate everything together u will definitely get your answer of -81x + 27

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2 years ago

Determine whether the relationship between the circumfrance of a circle and its diameter is a direct variation. If so, identify

kipiarov [429]

Answer:

The relationship between the circumference of a circle and its diameter represent a direct variation and the constant of proportionality is equal to the constant $\pi$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y=kx$

where K is the constant of proportionality

In this problem we know that

The circumference of a circle is equal to

$C=\pi D$

therefore

the relationship between the circumference of a circle and its diameter is a direct variation and the constant of proportionality is equal to the constant $\pi$

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3 years ago

Write an equation of the line that passes through the pair of points (5, 8) and<br> (9, 16).

SashulF [63]

Answer:

D: y = 2x - 2

Step-by-step explanation:

1. $\frac{16-8}{9-5}$ = 2

2. y = 2x + b

3. Insert the points into the equation: 8 = 10 + b

4. b = -2

5. y = 2x - 2

6 0

2 years ago

Read 2 more answers

Write an expression equivalent to `m+m+m+m` that is a product of a coefficient and a variable. Please include an explanation!

Marina CMI [18]

Answer:

Step-by-step explanation:

it would be 4m because there are four different copies and the variable being used originally is 'm'. therefore, we can move it around and since addition is basically the longer version of multiplication, we would correct this to 4m.

good luck :)

i hope this helps

have a nice day !!

6 0

2 years ago

Read 2 more answers

Can someone help me with problem please? It’s special right triangle: decimal answers (Round to the nearest tenth)

DochEvi [55]

Answer:

h= 4.6, c=7.1

Step-by-step explanation:

First you need to know in a 30 60 90 triangle the sides ratios are x, 2x and x√3, and for 45 90 45 it is x, x and x√2

so <em>h</em> is 8/√3 and you rationalize the bottom so it becomes 8√3/3. when you solve this and round to nearest hundred it becomes 4.6. for the second one, it is 5√2 and when you solve this and round, it becomes 7.1

8 0

3 years ago