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Hatshy [7]
3 years ago
8

Solve the two-step equation. 5.1 = –3x – 4.2 1. Add 4.2 to both sides. 2. Divide both sides by -3. The solution is x = _________

.
Mathematics
2 answers:
Serggg [28]3 years ago
6 0

Answer:

5.1 = -3x - 4.2

-3x - 4.2 = 5.1

-3x = 5.1 + 4.2

-3x = 9.3

x = 9.3/-3

x = -3.1

Kitty [74]3 years ago
4 0

Answer:

-3.1 =x

Step-by-step explanation:

5.1 = –3x – 4.2

Add 4.2 to each side

5.1+4.2 = –3x – 4.2+4.2

9.3 = -3x

Divide each side by -3

9.3 / -3 = -3x/-3

-3.1 =x

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Jane is trying to estimate the average electric bill amount of people who live in Las Cruces in summer time. She randomly select
Lina20 [59]

Answer:

The estimated average electric cost amount of all residents in Las Cruces = 182.9

Step-by-step explanation:

The bill amounts from the electric company for the month of July for 10 randomly selected houses from the map was obtained to be

135 265 215 103 156 203 125 156 230 241

Using the Central Limit theory, the mean of a sample extracted randomly from an independent distribution is approximately equal to the population mean of the independent distribution.

This means that the sample mean of a random sample extracted from the population is a good estimate of the population mean.

Sample mean ≈ Population mean

μₓ = μ

Mean = = (Σx)/N

The mean is the sum of variables divided by the number of variables

x = each variable

N = Sample size = 10

Σx = (135+265+215+103+156+203+125+156+230+241) = 1,829

Sample mean = (1,829/10) = 182.9

Population mean ≈ sample mean

Population mean ≈ 182.9

Hope this Helps!!!

8 0
3 years ago
Abdul rolls a fair six-sided die and a fair four-sided die simultaneously. The sample space of all possible
gregori [183]

Answer: 7/24

Step-by-step explanation:

Probability is the branch of mathematics that is concerned with the numerical descriptions of how likely an event will occur or how likely a proposition is true

The probability that the six-sided die is three or Abdul rolls doubles is 7/24. The calculation is attached.

4 0
3 years ago
Use the given information to solve the triangle for A = 150°, b = 4.8, a = 9.4
ELEN [110]
Well you can start by drawing a triangle with the information 

the size of angle B can be found using the Law of Sine

\frac{sin(150)}{9.4)}  =  \frac{sin(B)}{4.8}

the size of angle C can be found using angle sum of a triangle. 

The length of side c can be found using the Law of Cosines

c^2 = 4.8^2 + 9.4^2 - 2 \times4.8\times9.4\times  cos(C)

hope it helps
7 0
3 years ago
-12=3-2k-3k<br><br> Solving multi-step equations<br><br> I give Brainliest!
inessss [21]

Answer:

k = 3

Step-by-step explanation:

-12 = 3 - 2k - 3k

-12 = 3 - 5k

5k = 15

k = 3

6 0
3 years ago
What is the x-coordinate of the solution to the system of equations
solniwko [45]
Use elimination method - I am eliminaing the y-variable.

1(5x + 8y = 16)    →    5x + 8y = 16
4(6x  - 2y = 54)    →  24x - 8y = 216
         Add equations: 29x       = 232
            Divide by 29:    x        = 8

Answer: x = 8

7 0
3 years ago
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