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scoray [572]
3 years ago
13

3|2x+5|-9 = 0 solve the absolute value equation

Mathematics
1 answer:
Ronch [10]3 years ago
3 0

Answer:x=−1 or x=−4

Step-by-step explanation:

Let's solve your equation step-by-step.

3(|2x+5|)−9=0

Step 1: Add 9 to both sides.

3(|2x+5|)−9+9=0+9

3(|2x+5|)=9

Step 2: Divide both sides by 3.

3(|2x+5|)

3

=

9

3

|2x+5|=3

Step 3: Solve Absolute Value.

|2x+5|=3

We know either2x+5=3or2x+5=−3

2x+5=3(Possibility 1)

2x+5−5=3−5(Subtract 5 from both sides)

2x=−2

2x

2

=

−2

2

(Divide both sides by 2)

x=−1

2x+5=−3(Possibility 2)

2x+5−5=−3−5(Subtract 5 from both sides)

2x=−8

2x

2

=

−8

2

(Divide both sides by 2)

x=−4

Answer: x=−1 or x=−4

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Tony's Mom gives him a weekly allowance. Due to his bad behavior, his allowance has been shrinking at a rate of 2 3/10 dollars e
nikitadnepr [17]

Answer:

-3 2/7 per day

Step-by-step explanation:

-2 3/10 then put that all over 3 1/2

-23/10 divided by 7/2

-23/10 *21/7 = -23/7= -3 2/7 per day

the 10 cross out and make a 5

i should be right

7 0
3 years ago
Read 2 more answers
Solve for x: 1 over 3 (2x − 8) = 4. (1 point)
garik1379 [7]

Answer:

x=6

Step-by-step explanation:

2x - 8 = 4 \\ 2x = 4 + 8 \\ 2x = 12 \\ x =  \frac{12}{2}  \\ x = 6

6 0
2 years ago
The difference between a number b and 7.4 is -6.8
Lera25 [3.4K]

Hello from MrBillDoesMath!

Answer:

b = 0.6


Discussion:

The question can be written as

b - 7.4 = -6.8  =>           (now add 7.4 to each side)

b - 7.4 + 7.4 = -6.8 + 7.4 =>       ( note: -7.4 + 7.4 = 0)

b = 0.6

Thank you,

MrB


3 0
3 years ago
What is (3.14)(87.5)²=____?
Radda [10]

Answer:

24040.625

Hope this helped! I'm not good at explaining the steps, but this is the answer.

5 0
2 years ago
Which ordered pairs make the open sentence true? 3x+y<14 Select all the correct answers. (7, −7) (−1, 6) (3, 6) (4, −1) (6, 0
Jet001 [13]

Answer:

(4, - 1)

(-1, 6)

Step-by-step explanation:

Given the expression :

3x+y<14

Test the opprions to find out the true statement.

(7, - 7)

3(7) + (-7) < 14

21 - 7 < 14

15 < 14 (not true)

(-1, 6)

3(-1) + 6 < 14

3 + 6 < 14

9 < 14 ( true)

(3, 6)

3(3) + 6 < 14

9 + 6 < 14 ( not true)

(4, - 1)

3(4) - 1 < 14

12 - 1 < 14 ( true)

(6,0)

3(6) + 0 < 14

18 < 14 ( not true)

4 0
2 years ago
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