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
nadezda [96]
2 years ago
8

Which expression is equivalent and why?

Mathematics
1 answer:
Ivenika [448]2 years ago
3 0

9514 1404 393

Answer:

  C.  1.15x

Step-by-step explanation:

You are given the expression for the cost:

  x + 0.15x

Combining like terms, this becomes ...

  1.15x . . . . . matches choice C

You might be interested in
You are an administrative assistant. Your boss has
enot [183]
Option A: 156 + 179 + 25 + 25 = $385
Option B: 334 + 15 + 15 = $364

Option B is cheaper. 10% of $364 is $36.40. That is what you would save with the third option.
7 0
3 years ago
What value of x satisfies the equation 5(x – 3) – 2(x + 1) = 4?
hjlf

Answer:

x = 7

Step-by-step explanation:

To solve:

Distribute 5 among everything inside the first parentheses. You'll get 5x - 15.

Next distribute -2 among everything in the second parentheses. You'll get

-2x - 2.

<u>All together: 5x - </u><u>15</u><u> </u><u>-</u><u>2x </u><u>-</u><u> </u><u>2</u><u> </u><u>= 4</u>

Now combine like terms:

5x - 2x = 3x and -15 - 2 = - 17

<u>All</u><u> </u><u>together</u><u>: 3x -</u><u> </u><u>17 = 4</u>

Add 17 on both sides to get 21, and then divide both sides by 3. Answer is x = 7.

________________________________

Last, don't forget to check your work.

You can plug in 7 for x to get:

5(7 - 3) = 20

5 × 7 = 35

5 × -3 = -15

35 - 15 = 20

-2(7 + 1) = -16

-2 × 7 = -14

-2 × 1 = - 2

-14 -2 = -16

<u>20 - 16 = 4</u>

⬆⬆⬆Therefore this is correct.

Sorry this is a bit lengthy, but hope this helps :)

5 0
2 years ago
In the largest clinical trial ever​ conducted, 401,974 children were randomly assigned to two groups. The treatment group consis
BARSIC [14]

Answer:

The requirements for the hypothesis test does satisfied the method for testing the claim that from two population proportions the rate of polio is less for children given the salk vaccine.

Step-by-step explanation:

The percentage of children in the treatment group was:

(201229/401974)*100 = 49.9%

The percentage of children given placebo was:

(200745/401974)*100 = 50.1%

The percentage of children that developed polio in the treatment group:

(33/200745)*100 = 0.0164%

The percentage of children that developed polio in the placebo group:

(115/201229)*100 = 0.0571%

The percentage difference between the two group:

((0.0571-0.0164)/0.0571) = 61.62%

Therefore:

The amount of children used for each group was almost divided into half of the total amount of children. The test revealed although very small percentages of the both group developed polio, 68.62% more children given placebo than the children that was given the salk vaccine. Therefore, the study shows that the rate of polio is less for children given the salk vaccine and the the hypthesis test is satisfied.

6 0
2 years ago
X is called the _____ When using scientific notation the _____ is 10.​
Bumek [7]

Answer:

X is called the power of

1 is 10

Thank you and please rate me as brainliest as it will help me to level up

7 0
3 years ago
PLZ HELP FAST multiple choice<br>touching spirit bear​
Juli2301 [7.4K]
Look this up
On quizlet it will give you the answer
5 0
3 years ago
Other questions:
  • 3 if the probability of randomly drawing a number ending in 3 is 37/156, what I the probability of not drawing a number ending i
    12·1 answer
  • What do large circus animals wear to keep their legs warm worksheet 2.10 answers
    8·2 answers
  • The product of-2 and the sum of a number and 8
    6·1 answer
  • Any answers for 3-6 ? And how to find a rule ? And what is a rule ? ( please be specific ) Thanks
    12·1 answer
  • What is the cube root of 3 and 343
    14·1 answer
  • Find the slope of the line that passes through the two points (-10,5) and (-2,8)
    13·1 answer
  • Mendeleev was the first to organise elements based on their similarities *<br> True<br> False
    11·1 answer
  • The radius of a circle is 7 cm. Find its area to the nearest tenth. (Please help due in an hour)
    15·1 answer
  • FREEEE POINTSSSSSSSS<br><br> 10 MINUS 8
    9·2 answers
  • Find the missing length. Round to the nearest tenth. <br> HELP PLEASE!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!