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Anton [14]
3 years ago
11

solve the system of equations 9x-9y=-9 and 4x-3y=-8 by combining the equations PLEASE HELP QUICKLY!!!!!

Mathematics
2 answers:
Len [333]3 years ago
8 0

9x-9y=-9

x-y=-9/9

x-y+1=0.......(1)

4x-3y=-8

4x-3y+8=0....(2)

combining equation we get

(x-y+1)(4x-3y+8)=0

x(4x-3y+8)-y(4x-3y+8)+4x-3y+8=0

4x²-3xy+8x-4xy+3y²-8y+4x-3y+8=0

<u>4x²+3y²-7xy+12x-11y+8=0</u><u> </u><u>is</u><u> </u><u>your</u><u> </u><u>equation</u><u>.</u>

exis [7]3 years ago
8 0

ANSWER:

9x - 9y = - 9

9(x - y) = - 9

x - y = - 1 ...(1)

And, 4x - 3y = - 8 ...(2)

On combining both equations, we get

x - y + 4x - 3y = - 1 - 8

5x - 4y = - 9.

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Two thirds times a number plus fifteen totals nine. what is the number?
kondor19780726 [428]

Let x represent the number:

2/3(x)+15=9

2/3(x)= -6

x= -6/(2/3)

x= -6*(3/2)

x= -9

8 0
3 years ago
2/5of a number is 80. What is 3/4of the same number?
lara [203]

Answer:

2/5of a number is 80 5/5 = 1  32/1 = simplified = 32

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8 0
3 years ago
Mia drives 55 miles per hour. The total miles driven is given by the function C(m)=55
OleMash [197]

Answer:

Common difference is 55

Step-by-step explanation:

C(m)=55m

Substitute m=1 to find the distance traveled by Mia in one hour

55m= 55(1)

= 55

Distance traveled in one hour is 55 miles. Substitute m=2 to find the distance traveled by Mia in 2 hours

55m=55(2)

= 110

Distance traveled in 2 hours is 110 miles. Substitute m=3 to find the distance traveled by Mia in 3 hours

55m=55(3)

= 165

Distance traveled in 3 hours is 165 miles. Substitute m=4 to find the distance traveled by Mia in 4 hours

55m=55(4)

=  220

Distance traveled in 4 hours is 220 miles. Then the common difference is

d=110-55=165-110=220-165=55

3 0
3 years ago
Helppppp please with this one hurry
attashe74 [19]

2 : 6 = 1 : 3

4 : 12 = 1 : 3

6 : 18 = 1 : 3

8 : 24 = 1 : 3


Answer is 1 :3

5 0
3 years ago
Read 2 more answers
the vegetable display automatically sprays a mist over the vegetables according to a repeating tomer you set...how many minutes
skelet666 [1.2K]
---------------------------------------------------------------------
Calculate the spray interval to spray 5 times a day
----------------------------------------------------------------------
one day = 24 hour
24 ÷ 5 = 4.8 hours

----------------------------------------------------------------------
Find the interval in minutes
----------------------------------------------------------------------
4.8 hours = 4h 48 mins
4.8 hours = (4 x 60) + 48
4.8 hours =288 mins

----------------------------------------------------------------------
Answer: 288 mins
----------------------------------------------------------------------
5 0
3 years ago
Read 2 more answers
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