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Angelina_Jolie [31]
3 years ago
11

X/20=4/5 what’s us the Poportion

Mathematics
2 answers:
Elena L [17]3 years ago
6 0

Answer:

For this question, x = 16

Step-by-step explanation:

x/20 = 4/5

if we cross multiply, we will have

x × 5 = 4 × 20

5x = 80

x = 80/5

x = 16

ehidna [41]3 years ago
5 0

Answer: 16

Step-by-step explanation:

X/20 = 4/5

Cross multiply

(5×X) = (20×4)

5x = 80

x = 80/5

x = 16

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The initial cost of an office fax machine is $100. After 1 year, its value becomes $80. Which is the correct linear depreciation
Elis [28]

Answer:

y=100-20x

Step-by-step explanation:

Let the x-axis be the time (in years) and the y-axis the value of the fax machine (in dollars).

We know that the initial value of the fax machine is $100; in other words, when the time is zero years, the value is $100, or as an ordered pair (0, 100). We also know that after 1 year the value decreases to $80, so (1, 80).

Now we can find the slope of the line passing through those two points using the slope formula

m=\frac{y_2-y_1}{x_2-x_1}

where

m is the slope

(x_1,y_1) are the coordinates of the first point

(x_2,y_2) are the coordinates of the second point

Replacing values:

m=\frac{80-100}{1-0}

m=-20

Now, to complete our model we are using the point slope formula

y-y_1=m(x-x_1)

where

m is the slope

(x_1,y_1) are the coordinates of the first point

Replacing values:

y-100=-20(x-0)

y-100=-20x

y=-20x+100

y=100-20x

We can conclude that the correct linear depreciation model is y=100-20x

7 0
3 years ago
I need help QUICK. I dont know this
iris [78.8K]
The answer is C i believe 
3 0
3 years ago
Frankie factored the expression ls 14m + 21pm - 35mq as 7(2m + 3pm - 5mq) . She thinks she has factored out the greatest common
shtirl [24]

Answer:

Disagree, as m is common to all terms of the expression and thus, can be factored. The factored expression is 7m(2 + 3p - 5q)

Step-by-step explanation:

If a variable is common to all terms of an expression, it can be factored.

14m + 21pm - 35mq

Here, m is common to all terms of the expression, so the factored expression is:

7m(\frac{14m}{7m} + \frac{21pm}{7m} - \frac{35mq}{7m}) = 7m(2 + 3p - 5q)

Disagree, as m is common to all terms of the expression and thus, can be factored. The factored expression is 7m(2 + 3p - 5q)

7 0
3 years ago
Graph the inequality x > 3.
Marianna [84]
The graph would look like first one, or like this: 

Hope this helped! c:

6 0
4 years ago
Read 2 more answers
N-6+4=24 solve for n
zubka84 [21]
N= 26
hope this helped !!
8 0
3 years ago
Read 2 more answers
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