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wariber [46]
2 years ago
13

What value of x makes this equation true? 12x - 15 = 6x - 3

Mathematics
1 answer:
djverab [1.8K]2 years ago
3 0

Answer:

2

Step-by-step explanation:

12 x - 15 = 6x - 3

12 x - 6x = 15 - 3

6x = 12

x = 12/6 = 2

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Population mean = 80
alexira [117]

Answer:

The answer is : 0.0597

Step-by-step explanation:

Population mean = μ = 80

Standard deviation = σ = 20

Sample = N = 60

σ_mean = σ/√N

= (20)/√(60) = 2.582

Now we will find z1 and z2.

z1 = {(84) - μ}/σ_mean = {(84)-(80)}/(2.582)= 1.549

z2 = {(88) - μ}/σ_mean = {(88)-(80)}/(2.582)= 3.098

Now probability that the sample mean will be between 84 and 88 is given by:

Prob{ (1.549) ≤ Z≤ (3.098) } = (0.9990) -(0.9393) = 0.0597

4 0
3 years ago
What is 35% of 370?
KiRa [710]
35% of 370  would be 129.5 
8 0
3 years ago
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(2x+5) = (3x-33)
aleksandr82 [10.1K]

Answer:

x=38

Step-by-step explanation:

(2x+5)=(3x-33)

2x-3x=-33-5

-x=-38

x=38

3 0
2 years ago
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Two submarines starting from the same point cruise for two hours, one covering 30 miles per hour and the other 40 miles per hour
Romashka-Z-Leto [24]

Answer:

20 miles away

Step-by-step explanation:

40*2 = 80

30*2=60

80-60=20

6 0
3 years ago
Is the equation 20z−5−12z=10z+8 one solution, no solution or infanate solutio?
marin [14]

Answer:

One solution.

Step-by-step explanation:

We have been given an equation 20z-5-12z=10z+8. We are asked to find the number of solutions for our given equation.

Let us solve our given equation. Upon combining like terms, we will get:

20z-12z-5=10z+8

8z-5=10z+8

8z-10z-5=10z-10z+8

-2z-5=8

-2z-5+5=8+5

-2z=13

\frac{-2z}{-2}=\frac{13}{-2}

z=-\frac{13}{2}

Therefore, our given equation has only one solution.

6 0
3 years ago
Read 2 more answers
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