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Anarel [89]
3 years ago
8

Deandra traded $2800 for Swiss francs, immediately changed her mind, and

Mathematics
1 answer:
inessss [21]3 years ago
6 0

Answer:

A

Step-by-step explanation:

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Determine the standard form of the equation of the line that passes through ( -5,0 ) ( 0 ,-9)
insens350 [35]

The general form for a line through two points (a,b) and (c,d) is

(c-a)(y-b)=(d-b)(x-a)

This is better than the slope forms because it works in the no slope case, as does the standard form.

If you haven't seen it before, it works because when (x,y)=(a,b) we get (c-a)(b-b)=(d-b)(a-a), both sides zero, and when (x,y)=(c,d) we get (c-a)(d-b)=(d-b)(c-a), clearly equal sides.

Here we have

(0 - -5)(y - 0) = (-9 - 0)(x - - 5)

5y = -9(x+5)

5y = -9x - 45

9x + 5y = -45

Ironically there are two standards for standard form; one with the constant alone on the right and one with the whole thing equal to zero.  I like the constant alone.

Answer: 9x + 5y = -45

Check:

We check each point is on the line

(-5,0)

9(-5) + 5(0) = -45, good

(0, -9)

9(0) + 5(-9) = -45, good again


5 0
3 years ago
Read 2 more answers
Which expressions are equivalent to this expression?
Deffense [45]

4x+4

factor

4(x+1)

2(2x+2)

x+3x+42x+2x+1+3


Choices B,C,D

6 0
3 years ago
Read 2 more answers
Find the value of X.
iris [78.8K]

Answer:

Step-by-step explanation:

90 + 122 + 4x + 19 + 9x - 8 + 7x - 3 = 540

220 + 20x = 540

-220             -220

--------------------------

20x = 320

/20     /20

----------------

x = 16

8 0
2 years ago
FREE POINTS!!!!!!!!!! 10 POINTS Len's recipe for blueberry muffins calls for 110.25 grams of brown sugar for the muffin batter a
RSB [31]
Wow.... My brother Said that it took him a while to figure it out... but

add 110.25 and 55.45

you would get 165.70

multiply 165.70 by 4.5

then you would get 745.65

745.65 is your answer 
7 0
3 years ago
Read 2 more answers
Some help me please i have 9 questions
Lyrx [107]

awnser:

m<3=50

Step-by-step explanation:

seen in the picture if you need help let me know

5 0
3 years ago
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