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guajiro [1.7K]
3 years ago
5

4x-3y=17 Y=3x-4 Solve by subsition

Mathematics
1 answer:
Fudgin [204]3 years ago
8 0
4x - 3y = 17
y = 3x - 4
(-1, -7)
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marcia went to lunch her bill was 14.25$ she wants to leave a 20% tip how much money should she leave​
madreJ [45]

Answer:

2.85

Step-by-step explanation:

You divide 14.25 by 10 then multiply that by 2

equation: (14.25 divided by 10)2

8 0
3 years ago
A town in east Texas received 10 inches of rain in 2 weeks. If it kept raining at this rate for a 31- day month, how much rain d
umka21 [38]

2 weeks = 14 days

10 / 14 = 0.71428571428

0.71428571428 * 31 = 22.1428571429

The town received about 22 inches of rain.

If you include the 2 weeks, then it would be 32 inches of rain.


Hope this helps!

7 0
3 years ago
9x-y=5<br> 7x-6y=5<br> Solve the system by the substitution method
qwelly [4]
  9x - y = 5
7x - 6y = 5

Solve both equations for one variable. I'll solve for y.

9x - y = 5            Subtract 9x from both sides
      -y = -9x + 5   Divide both sides by -1
       y = 9x - 5

7x - 6y = 5   Subtract 7x from both sides
      -6y = -7x + 5   Divide both sides by -6
          y = \frac{7}{6}x - \frac{5}{6}

Since both equations equal y, you can set them equal to each other and solve for x.

9x - 5 =<span> \frac{7}{6}x - \frac{5}{6}   Multiply both sides by 6 to eliminate the fractions
54x - 30 = 7x - 5    Subtract 7x from both sides
47x - 30 = -5          Add 30 to both sides
       47x = 25          Divide both sides by 47
           x = </span>\frac{25}{47}

Now, plug that x-value into the x of either equation. I'll plug it into 9x - y = 5.

9x - y = 5   Plug in the x-value
9(<span>\frac{25}{47}) - y = 5   Multiply
</span>\frac{225}{47} - y = 5   Subtract <span>\frac{225}{47} from both sides
</span>-y = <span>0.21276595744 (I had to convert it to a decimal)   Divide both sides by -1
 y = -</span><span>0.21276595744

So, the answer to the system is (</span>0.53191489361, -<span>0.21276595744)</span>
8 0
4 years ago
CAN SOMEONE PLS EXPLAIN? Mr. Chang is taking his family for a vacation. He decides to drive to a holiday resort 444 miles from t
WARRIOR [948]

Answer:

Step-by-step explanation:

well let see...  if a car can start off of 2 gallons and run 24 miles from 2 gallons then you might have to divide 444 and 24 to see how much gallons you will need to get to your destination so....18.5??? idk please tell me if i'm wrong and if i'm right please mark me as braniest.

5 0
3 years ago
Evaluate the expression for the given value of the variable. 51 + 3/7r. R= - 1/2
mel-nik [20]

The answer is -50.429

You would replace the -1/2 where r is at, divide 7& -1/2, then add it to 51

4 0
3 years ago
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