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Tju [1.3M]
3 years ago
11

Solve: 2a-3=9 Solve: -3(b+2)= -9

Mathematics
2 answers:
Elina [12.6K]3 years ago
8 0
2a - 3 = 9......
the first thing you would have to do is add a 3 on both sides of the equation.
2a - 3 =9        ------>    2a = 12
  +3      +3
Next, divide the 2 out from the a.
2a = 12    ---------> a = 6
/2       2/
_________________________________________________
-3(b + 2) = -9
multiply the -3 in the parentheses

-3(b + 2) = -9 -------> -3b - 6 = -9
Add a 6 to both sides
-3b - 6 = -9 --------------> -3b = -3
     +6      +6  
Lastly divide -3 from both sides
-3b = -3  ----------------------> b = 1
/-3     /-3





Softa [21]3 years ago
3 0
The Solution are : a=3.
b=1.
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This is the answer when written in mixed form if that's what the question meant.
585 \ \frac{23}{45}
8 0
3 years ago
Actually help... if u dont hve the answer, dont respond.
Dimas [21]

Answer:

y = 1/3*x -3

Step-by-step explanation:

Method 1:

Grab two random points from the line.

(0,-3) and (3,-2)

Using the Point-Slope Form solve for m.

(-3 - (-2)) = m * (0 - (3))

-1 = m * (-3)

m = 1/3

Turning Point-Slope form into Slope intercept Form.

(y - (-3)) = 1/3 * (x - 0)

y + 3 = 1/3x

y = 1/3 - 3

Method 2:

Look at the y-intercept since y-int becomes our b. b = -3

From the y-int count rise/run as thats our Slope m. m = 1/3

Slope-intecept Form:

y = 1/3*x -3

4 0
2 years ago
Read 2 more answers
Help its for someone!!​
yawa3891 [41]

Answer:

b 17/18

Step-by-step explanation:

Solve the one's in bracket then later solve everything together

5 0
3 years ago
the area of a circle is 96 square inches. What is the area of a circlewhose diameter is 1.5 times the diameter of the circle?
mars1129 [50]
The area of a circle A equals either:
πr² or πd²/4

96 = πd²/4 => d = 11 inches

The diameter of the second circle equals :
11*1.5 = 16.5 inches

The area equals: π(16.5)²/4 = 214 square inches

Good luck
5 0
3 years ago
How many liters each of a 25% acid solution and a 50% acid solution must be used to produce 80 liters of a 40% acid solution?
alina1380 [7]

Answer:

  • 32 and 48 liters

Step-by-step explanation:

Let 25% solution is x liters, then 50% solution is (80 - x) liters.

<u>Acid content is going to be same:</u>

  • 0.25x + 0.5(80 - x) = 80*0.4
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  • 0.25x = 8
  • x = 8/0.25
  • x = 32 liters

So 32 liters of 25% solution and 80 - 32 = 48 liters of 50% solution

4 0
3 years ago
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