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k0ka [10]
3 years ago
8

Please help...

Mathematics
1 answer:
julsineya [31]3 years ago
7 0

Answer:

a. Step 1

Step-by-step explanation:

When solving equations, in order to isolate the variable (get the 'x' by itselt), you need to use inverse (opposite) operations.  In the equation:

l2x - 4l - 3 = 3

Step 1: l2x - 4l = -3 + 3 *this step is incorrect because the inverse of subtraction is addition so the '-3' should be added to both sides:

l2x - 4l - 3 + 3 = 3+ 3

Step 2: l2x - 4l = 6

Step 3: 2x - 4 = 6

Step 4: 2x  = 10

Step 5: x = 5

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8. Find ab - c if a = 5, b = -12, and c = 60.
Romashka [77]

Answer:

8.) -120

9.) -5

10.) -1

Step-by-step explanation:

8.)  ab - c

     5(-12) - 60

     -60 - 60 = -120

9.)   -10 - (-7) + 2 (3 - 4)

      -3 + 2(-1)

      -3 + (-2) = -5

10.) Add all the numbers up then divide by how many numbers there are.

   

8 0
3 years ago
Solve the simultaneous equation 5x+3y=23 2x+4y=12
uranmaximum [27]

() = Fraction

Answer:

1. x= −(3 /5 y)+ (23 /5)

2. x=−2y+6

Step-by-step explanation:

Let's solve for x.

5x+3y=23

Step 1: Add -3y to both sides.

5x+3y+−3y=23+−3y

5x=−3y+23

Step 2: Divide both sides by 5.

5x /5 = −((3y+23) /5)

x= −(3 /5 y)+ (23 /5)

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

Let's solve for x.

2x+4y=12

Step 1: Add -4y to both sides.

2x+4y+−4y=12+−4y

2x=−4y+12

Step 2: Divide both sides by 2.

(2x /2 )= −((4y+12) /2)

x=−2y+6

Hope it helped!

5 0
3 years ago
PLEASE HELP IM DESPERATE <br><br> If a1=9 and an=- 3an-1 – 5 then find the value of a5.
melomori [17]

Answer:

A5 is approximately 5.8 by 8.3 inches in size, and it's the closest in size to the U.S. paper size called the “half-letter” size, at 5.5 by 8.5 inches. But here's how all the A-series sizes break down: A0 paper is 841 by 1189 millimeters, approximately 33.1 by 46.8 inches.A5 measures 148 × 210 millimeters or 5.83 × 8.27 inches. In PostScript, its dimensions are rounded off to 420 × 595 points.A5148 x 210mm5.8 x 8.3 inch

3 0
3 years ago
Read 2 more answers
Dan earns £273 over the course of a five-day week. How much is that per day?
MA_775_DIABLO [31]

Answer:

The answer is 54.6

Step-by-step explanation:

If dan earn 273 in five days then just divide the 5days and the money he earn in five days

4 0
3 years ago
Read 2 more answers
The Chen family sold its house through a real estate agent for $330,000. If the real estate agent gets a 4.5% commission, how mu
Galina-37 [17]

Answer:

Step-by-step explanation:

1.first 330,000 divided by 100 wich Is 3300 then multiply that by 4 wich is 13,200

2. then 330,000 divided by 1000 wich is 330 multiply that by 5 wich is 1,650

3. Add  1,650 + 13,200 + 330,000 wich is 344,850.00 so a

8 0
4 years ago
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