All categories

2 years ago

Which of these is a two-step equation? A.X+ 9 = 21 B.x= 11+2 C.2x + 9 = 21 D.x/3 = 9

Mathematics

2 answers:

MissTica2 years ago

7 0

Answer: C

Explanation:
x+9=21
x=12

x=11+2
x=13

2x+9=21
2x=12
x=6

x/3=9
x=27

inysia [295]2 years ago

4 0

The answer would be C
2x + 9 = 21
1. 2x = 12
2. x = 6

You might be interested in

Find the margin of error for a 90% confidence interval when the standard deviation is LaTeX: \sigma= 50????=50 and LaTeX: n = 25

Murrr4er [49]

Answer:

The margin of error for a 90% confidence interval is 16.4

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 25

Standard deviation = 50

$z_{critical}\text{ at}~\alpha_{0.10} = \pm 1.64$

Margin of error =

$z_{critical}\times \dfrac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$1.64\times \dfrac{50}{\sqrt{25}} = 16.4$

Thus, the margin of error for a 90% confidence interval is 16.4

8 0

2 years ago

What is the explicit formula for the following sequence: -4, -1, 2, 5...?

stiv31 [10]

U have an arithmetic sequence with a common difference of 3

A(n) = -4 + (n-1) * 3

4 0

2 years ago

How much is left after 24,815.00 in taxes is deducted from an annual salary of 83,500.00

Debora [2.8K]

$58,685 would be the amount left over.

6 0

2 years ago

Just a quick question.

Wittaler [7]

$250. Hope this helps :)

4 0

2 years ago

laiz [17]

Answer:

Step-by-step explanation:

2x² - 28x + 98 = 0

x² - 14x + 49 = 0

(x - 7)² = 0

x = 7

3 0

2 years ago