1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
densk [106]
2 years ago
8

Identify the property that justifies step 1 when solving the equation

Mathematics
1 answer:
Ierofanga [76]2 years ago
3 0

Answer:

Distributive Property

Step-by-step explanation:

Answer choice a is correct because you are distributing 2 to each term in the parentheses.  When you multiply 2 to each factor in the parentheses, it simplifies to 2x-2, thus making the new equation 6x+2x-2=30

You might be interested in
Which number in the set {−250, 0, 372} is a natural number? (correct answers only pls, this test is important!)
andrey2020 [161]
Only 372 is a natural number  
6 0
2 years ago
The equation above shows how temperature F, measured in degrees Fahrenheit, relates to a temperature C, measured in degrees Cels
FromTheMoon [43]
Isjxbcj is on 3 2020 today
4 0
2 years ago
What is the scientific notation of 427 thousand
Veronika [31]
Thousand is 1,000, or 10^3, when multiplied by the 100 in 427, it becomes 10^5. Because we divided 427 and put the notation in the 10^#. It would be 4.27, once we add the ten^#, it becomes..

Answer: 4.27*10^5
6 0
3 years ago
Read 2 more answers
The vertices of a rectangle are given in the columns of the matrix (picture 1).
Alex17521 [72]

Answer:

(0 , 0) , (18 , 0) , (18 , -18) , (0 , -18) ⇒ the second answer

Step-by-step explanation:

∵ The vertices of the rectangles are:

  (0 , 0) , (0 , 6) , (6 , 6) , (6 , 0)

∵ 3 × \left[\begin{array}{ccc}0&1\\-1&0\end{array}\right] × R

∴ That is mean The rectangle rotate 270° around the origin

  (270° anti-clockwise or 90° clockwise)

  and enlargement by scale factor 3

8 0
2 years ago
Question 3 A study was performed to determine whether men and women differ in their repeatability in assembling components on pr
Fed [463]

Answer:

There is no sufficient evidence to support the claim that men and women differ in repeatability for this assembly task

Step-by-step explanation:

Given

Let subscript 1 represent men and 2 represent women, respectively.

n_1 = 25

n_2 = 21

s_1 = 0.98

s_2 = 1.02

\alpha = 0.02

Required

Determine if here is enough evidence

First, we need to state the hypotheses

H_o: \sigma_1^2 = \sigma_2^2

H_1: \sigma_1^2 \ne \sigma_2^2

Next, calculate the test statistic using:

F = \frac{s_1^2}{s_2^2}

F = \frac{0.98^2}{1.02^2}

F = 0.923

Calculate the rejection region;

But first, calculate the degrees of freedom

df_1 =n_1 - 1

df_1 =25 - 1

df_1 =24

df_2 = n_2 -1

df_2 = 21 - 1

df_2 = 20

Using the F Distribution:  table

c = \frac{\alpha}{2}

c = \frac{0.02}{2}

c = 0.01

At 0.01 level (check row 20 and column 24), the critical value is:

<em></em>f_{0.01,24,20} = 2.86<em> --- the upper bound</em>

At 0.01 level (check row 24 and column 20), the critical value is:

f_{0.01,20,24} = 2.74

Calculate the inverse F distribution.

f_{0.99,20,24} = \frac{1}{f_{0.01,20,24}} = \frac{1}{2.74} =0.365 ---- the lower bound

The rejection region is then represented as:

0.365 < Test\ Statistic < 2.86

If the test statistic falls within this region, then the null hypothesis is rejected

F = 0.923 --- Test Statistic

0.365 < 0.923 < 2.86

<em>The above inequality is true; so, the null hypothesis is rejected.</em>

<em>This implies that, there is no sufficient evidence.</em>

7 0
2 years ago
Other questions:
  • A bacteria colony is quickly growing in a petri dish. The number of bacteria, y , is modeled by the function y=2(10)^2 where x i
    7·1 answer
  • Someone plz help me
    6·1 answer
  • 45 is 5% of what number
    9·2 answers
  • The times for three runners in a 100 yard dash are 9.85 s, 9.6 s and 9.625 s. What is the winning time?
    15·1 answer
  • Which expression is not a perfect square trinominal
    13·1 answer
  • marco has a piece of wood that measures 9 x 1/10 6 x 1/100 4 x 1/1000 meter. how can this measurement be written as a decimal?
    14·1 answer
  • G(b) = 5b- 9<br> h(b) = (b - 1)^2<br> Evaluate.<br> (hog)(-6) =
    5·1 answer
  • If YV = 28 in, find the length of the major arc VYX. Round to the nearest tenth ( one decimal place).
    7·1 answer
  • How do you write 60% as a decimal?​
    8·2 answers
  • Find the coordinates of the center of this circle: (x - 9) ^ 2 + (y + 4) ^ 2 = 16
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!