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zubka84 [21]
3 years ago
5

Is the ordered pair (6,5) a solution to the equation 3x - 4y = -2? Explain.

Mathematics
1 answer:
Citrus2011 [14]3 years ago
5 0
X=4y/3 - 2/3 is the awnser
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Someone please help!
lutik1710 [3]

Answer:

All are correct

Step-by-step explanation:

If Friend A gives 145 and Friend C gives 245 they already have a total of $390 out of the $700. So the missing amount is 310, half that for both friends and get 155, so the last 2 could both pay 155. No matter which way you put the number you will get the same answer. And as the communitive property states "The numbers on which we operate can be moved or swapped from their position without making any difference to the answer." and all of the answer choices apply to that statment.

8 0
3 years ago
PLEASE HELP ME
Orlov [11]

Answer:

15

Step-by-step explanation:

Hey there!

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

4 0
3 years ago
Read 2 more answers
Use the equation tool to complete the table. Someone help
svetlana [45]
848 (811+37)

Using the equation
-780 + 37x44=y
-780+ 1,628= 848

4 0
3 years ago
Number 1. Write an Equation for this situation Amanda is training for a marathon she sets the pace so that every mile takes eigh
guajiro [1.7K]

ANSWER!

Number 1: t=8m

Number 2: 2.50d=x

7 0
3 years ago
A boat travels at 15 km/hr in still water. In travelling 45 km downstream from town A to town Bit completes the journey in 75 mi
Crank
Let the speed of river be x   km/hr down stream.

Time = Distance / speed

Since river flows downstream,  speed of boat down stream = Speed of boat + speed of river =  (15 + x).

 Since river flows downstream,  speed of boat upstream = Speed of boat - speed of river =  (15 - x).

Time Upstream - Time Downstream = 75 minutes

Time Upstream =  45 / (15 - x)

Time Downstream =  45 / (15 + x)

75 minutes = 75/60  =  5/4 hours

Time Upstream - Time Downstream = 75 minutes = 5/4 hours

45 / (15 - x)    -    45 / (15 + x)  = 5/4          Divide both sides by 45

1 / (15 - x)    -    1 / (15 + x)  = (5/4)*(1/45)

 1 / (15 - x)    -    1 / (15 + x)  = 1/36

((15 + x) - (15 -x)) / (15-x)(15+x)  = 1/36

(15 +x - 15 +x) / (15-x)(15+x)  =  1/36

  2x / (15-x)(15+x)  = 1/36

 (15-x)(15+x) = 2x*36

(15-x)(15+x) = 72x

225 - x² = 72x

0 =  x² + 72x -225

x² + 72x -225 = 0            This is a quadratic function, use a calculator that can solve the function, by inputting the function.

x = 3, or -75.  Since we are solving for speed, we can not have negative values.

x = 3 is the only valid solution.

Speed of the river =  3 km/hr  downstream.

Copyright.
7 0
4 years ago
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