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Luba_88 [7]
3 years ago
5

Solve the system using the substitution method 4x+6y=8 3x+y=9

Mathematics
1 answer:
stepladder [879]3 years ago
4 0
4x+6y=8
3x+y=9

y = 9 - 3x

4x + 6( 9-3x ) = 8
4x + 54 - 18x = 8
14x = 46
x = 23/7

y = 9 - 3(23/7)
y = 9 - 69/7
y = - 6/7
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100 POINTS!!
LiRa [457]
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Using the symbols provided we can write this is as:

a+c=35


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5 0
3 years ago
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Is anyone able to solve this system of equation? ​
kkurt [141]

Answer:

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Step-by-step explanation:

see photo attached for further explanation...

7 0
3 years ago
*1 A car is driving away from a crosswalk. The distance d (in feet) of the car from the crosswalk t
antoniya [11.8K]

Answer:

The change in the car's distance is 8 feet

Step-by-step explanation:

* Lets explain how to solve the problem

- A car is driving away from a crosswalk

- The distance d (in feet) of the car from the crosswalk t  seconds

  since the car started moving is given by the formula d = t² + 3.5

- The time increasing from 1 second to 3 seconds

- We need to now the change of the car's distance from the crosswalk

∵ The equation of the distance is d = t² + 3.5

∵ The time is 1 second

∴ d = (1)² + 3.5

∴ d = 1 + 3.5 = 4.5 feet

∵ The time is 3 seconds

∴ d = (3)² + 3.5

∴ d = 9 + 3.5 = 12.5 feet

∵ The change of the distance = d of 3 sec - d of 1 sec

∵ d of 3 sec = 12.5 feet

∵ d of 1 sec = 4.5 feet

∴ The change of the distance = 12.5 - 4.5 = 8 feet

∴ The change in the car's distance is 8 feet

7 0
4 years ago
4
Inga [223]
It's (A) 18 because if you add 46 & 26 it's 72 and then for you to get 18 , 72 + 18 = 90
4 0
3 years ago
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