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Alexeev081 [22]
3 years ago
8

Tell whether each equation represents a direct proportion. If so, identify the

Mathematics
1 answer:
sveticcg [70]3 years ago
6 0

Answer:

Step-by-step explanation:

1. 0.4y = x is a direct proportion.  It'd be more appropriate to write this as

   y =  x / 0.4, or y = 2.5x, in which case 2.5 is the constant of proportionality.

2. x = 1 - 2y is not a direct proportion because of the offset (1).  A line representing a direct proportion must go through the origin (0, 0); this particular line does not do that.

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B. Between 5 and 10 years old
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BRAINLIEST PLS HELP ASAP LINEAR EQUATIONS
Musya8 [376]

Answer:

first one

Step-by-step explanation:

Tracey bought 10 movies

some cost 13 and the others 16

Let x be the movies that cost 13 and y ones that cost 16

we can state that

  • x+y = 10

since Tracey both ten

  • 13x+ 16y = 139

since the total price is 139

so the system is :

\left \{ {{13x+16y=139} \atop {x+y=10}} \right.

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makvit [3.9K]

Answer:

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Step-by-step explanation:

6 0
3 years ago
What is the value of x
gayaneshka [121]

Answer:

Assuming the other side is 30, x=12

Step-by-step explanation:

X+(X+6)=30

2x+6=30   (open the brackets by distributing the plus sign inside)

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x=12          divide both sides by 12

This makes sense because of x is 6, and x+6 is 18, 6+18=30.

5 0
3 years ago
Read 2 more answers
Write the point-slope form of each graph. Use the red point to write your equation. State the point and slope.
Vinil7 [7]
Answer:

First Graph:

Slope = - 4/5

Point-Slope Form: y - 3 = - 4/5 (x + 2)

Point: (-2, 3)

Second graph:

Slope = 4

Point-Slope Form: y + 6 = 4 (x + 1)

Point: (-1, -6)

Step-by-step explanation:

First graph has two points: (-2, 3) & (8, -5)

Use the two points to find the slope using the Slope-Formula

Slope-Formula: y2 - y1/x2 - x1

m = slope

m = - 5 - 3/8 - - 2

m = - 8/10

m = - 4/5

The slope of the line will be - 4/5

Now for Point-Slope Form, we’ll need to use the two points with the slope to identify the Point-Slope Form of the graph

Two points: (-2, 3) & (8, -5)

Slope: - 4/5

Point-Slope Formula: y - y1 = m (x - x1)

Point-Slope Form: y - 3 = - 4/5 (x + 2)

The point will be: (-2, 3)



5 0
3 years ago
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