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
Yanka [14]
3 years ago
14

2(2x + 7) = 2 + 2xA. One Solution B. No Solution C. Infinite Solutions​

Mathematics
2 answers:
salantis [7]3 years ago
7 0

Answer: c no solution

Step-by-step explanation:

Variables (like x) do not have a actual number, so you can never truly answer the equation. Without a key, like a= 24. Number c.

Rudik [331]3 years ago
5 0
B. I am so sorry if it is not right
You might be interested in
Calculate the sample mean and sample variance for the following frequency distribution of heart rates for a sample of American a
spin [16.1K]

Answer:

Mean = 68.9

s^2 =18.1 --- Variance

Step-by-step explanation:

Given

\begin{array}{cccccc}{Class} & {51-58} & {59-66} & {67-74} & {75-82} & {83-90} \ \\ {Frequency} & {6} & {3} & {11} & {13} & {4} \ \end{array}

Solving (a): Calculate the mean.

The given data is a grouped data. So, first we calculate the class midpoint (x)

For 51 - 58.

x = \frac{1}{2}(51+58) = \frac{1}{2}(109) = 54.5

For 59 - 66

x = \frac{1}{2}(59+66) = \frac{1}{2}(125) = 62.5

For 67 - 74

x = \frac{1}{2}(67+74) = \frac{1}{2}(141) = 70.5

For 75 - 82

x = \frac{1}{2}(75+82) = \frac{1}{2}(157) = 78.5

For 83 - 90

x = \frac{1}{2}(83+90) = \frac{1}{2}(173) = 86.5

So, the table becomes:

\begin{array}{cccccc}{x} & {54.5} & {62.5} & {70.5} & {78.5} & {86.5} \ \\ {Frequency} & {6} & {3} & {11} & {13} & {4} \ \end{array}

The mean is then calculated as:

Mean = \frac{\sum fx}{\sum f}

Mean = \frac{54.5*4+62.5*3+70.5*11+78.5*13+86.5*4}{6+3+11+13+4}

Mean = \frac{2547.5}{37}

Mean = 68.9 -- approximated

Solving (b): The sample variance:

This is calculated as:

s^2 =\frac{\sum (x - \overline x)^2}{\sum f - 1}

So, we have:

s^2 =\frac{(54.5-68.9)^2+(62.5-68.9)^2+(70.5-68.9)^2+(78.5-68.9)^2+(86.5-68.9)^2}{37 - 1}

s^2 =\frac{652.8}{36}

s^2 =18.1 -- approximated

5 0
2 years ago
PLEASE HELP!!!! Find the value of -7 - 8 - (-8) - 7. 0 14 -14 -30
miskamm [114]

-7 - 8 - (-8) - 7 × 0(14) - 14 - 30

(I think that's what that says)

Do PEMDAS

0(14) = 0

-7 × 0 = 0

You're left with -7 - 8 - (-8) - 14 - 30

Go from left to right

-7 - 8 = -15

-15 - (-8) = -7

-7 - 14 = -21

-21 - 30 = -51

7 0
3 years ago
Read 2 more answers
Factorization of the expression (3x-2y)((a+b)+(4x-3y)(a+b)​
Mrrafil [7]
Hi!!
:D
your answer is

8 0
2 years ago
What is (2/3) to the 4th power?
Wewaii [24]
(\frac{2}{3})^4= \frac{2^4}{3^4}= \boxed{\frac{16}{81}}
8 0
3 years ago
159.98 divided by 6 <br><br> ASAPP
ArbitrLikvidat [17]

159.98 divided by 6 is 26.66, hopefully this is correct...

4 0
3 years ago
Other questions:
  • Write two equivalent expressions to the following radical expression: (√104 * √124)8
    12·1 answer
  • Write each product as a polynomial(a+2)(a+3)​
    8·1 answer
  • Can some please help me with this question?<br><br> Best answer gets full stars and brainliest. :)
    9·1 answer
  • I need help on finding x?
    7·1 answer
  • Let A={1, 2, 3, 4} and B= {2,5,7} find the set A U B
    12·1 answer
  • Angle G is a circumscribed angle of circle E.
    7·2 answers
  • Mario reduced a picture that is 10 inches long by 8 inches wide using a photocopier. The reduced picture is now 6 inches long. B
    13·1 answer
  • If the number of employed persons equals 180 million, the number of unemployed persons equals 15 million, and the number of pers
    12·1 answer
  • Please help me fast and please hurry this is very very important
    7·1 answer
  • Is the answer right?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!