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Kruka [31]
3 years ago
7

Which equation does the graph of the systems of equations solve?

Mathematics
1 answer:
12345 [234]3 years ago
8 0
Look at the intersecting point on the graph and see the ordered pair then wright it down
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Write an equation for the perpendicular line to the line whose equation is 4y-5x=20 that contains the point (-2,-3)
yuradex [85]

Answer:

4x + 5y = - 23

Step-by-step explanation:

the equation of a line in slope-intercept form is

y = mx + c ( m is the slope and c the y-intercept )

rearrange 4y - 5x = 20 into this form

add 5x to both sides

4y = 5x + 20 ( divide all terms by 4 )

y = \frac{5}{4} x + 5 ← in slope-intercept form

with slope m = \frac{5}{4}

given a line with slope m then the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m}, hence

m_{perpendicular} = - 1 / \frac{5}{4} = - \frac{4}{5}

y = - \frac{4}{5} x + c ← is the partial equation

to find c substitute (- 2, - 3) into the partial equation

- 3 = \frac{8}{5} + c ⇒ c = - \frac{23}{5}

y = - \frac{4}{5} x - \frac{23}{5} ← in slope-intercept form

multiply all terms by 5

5y = - 4x - 23 ( add 4x to both sides )

4x + 5y = - 23 ← in standard form




7 0
3 years ago
A group of workers takes 3 and 3/8 days to plant 9 and 3/4 acres.
Nikolay [14]
2 8/9  acres per day in simplest form

3 0
3 years ago
The exchange rate for converting units of currency X (x) to units of currency Y (y) was y = 1.05x.
Luba_88 [7]

a) For 900 units of currency X, at an exchange rate of y = 1.05x, you could get <u>945 of currency Y.</u>

b) The inverse function is x is <u>0.9524y</u> and it represents the conversion of units of currency Y to units of currency X.

c) For 46 units of currency Y, at the exchange rate of x = 0.9524y, you could get <u>43.81 of currency X</u>.

<h3>What is an exchange rate?</h3>

An exchange rate is a value that a currency has with another.

The exchange rate shows the proportion or ratio at which two currencies are exchanged.

<h3>Data and Calculations:</h3>

The exchange rate of X (x) to Y 9y) is y = 1.05x.

For 900 units of currency X, you could get 945 of currency Y (1.05 x 900)

The inverse function is x = 0.9524y (900/945)y

For 46 units of currency Y, you could get = 43.81 of currency X (0.9524 x 46).

Learn more about exchange rates at brainly.com/question/4711402

#SPJ1

4 0
1 year ago
Is the following table proportional or non proportional (3,5) (6,10) (9,15) (12,20)
Sholpan [36]

Answer:

This is proportional

Step-by-step explanation:

3,5

6,10

9,15

12,20

The x's go by +3

The y's go by +5

Hope this helped!

7 0
3 years ago
Given: StartFraction A D Over D C EndFraction = StartFraction B E Over E C EndFraction
sattari [20]

Answer:

♣: SAS similarity theorem

♦:definition of similar triangles

Step-by-step explanation:

Got the correct answers from ed

7 0
3 years ago
Read 2 more answers
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