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
shepuryov [24]
2 years ago
15

Please help, i have no idea what i did wrong. 20 points !

Mathematics
1 answer:
tresset_1 [31]2 years ago
6 0

Answer:Second Step

Step-by-step explanation:

On the right side in step two you added -3b-15b, and ended up with -12b. This is incorrect. -3b-15b is actually -18b

You might be interested in
*REMEMBER THAT ON STANDARD FORM YOU DONT USE FRACTIONS!!!
Novay_Z [31]
Standard form of a linear equation is

Ax + By = C, where A, B, and C are integers.

Add 3 to both sides to get

4x + 4y = 3
3 0
3 years ago
Read 2 more answers
A cyclist travels at 10 km/hr for 2 hours and then at 13 km/hr for 1 hour.
andrew11 [14]
Answer:11km/hr
Step by step explanation
In 1hr a cyclist travels 10 km so multiply 10 by 2 then he travels 13 km in 1 hour so keep it the same add 10(2)+13 to get 33 it took him 3 hrs in total to travel this distance so you must then divide 33 by 3 and you get average speed 11 km/hr
3 0
2 years ago
The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the aver
m_a_m_a [10]

Answer:

The true mean \mu it probably could be larger, smaller, or equal to 22

Step-by-step explanation:

False.

By definition the sample mean is defined as:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

For this case the value for the sample size is n =190 and the calculated sample mean is \bar X=22. This value represent the sample and for this case we can't assume that this value represent at all the population as the population mean \mu since we probably have variability from the data of the students at City College.

So we can conclude that the true mean \mu it probably could be larger, smaller, or equal to 22

7 0
3 years ago
Read 2 more answers
What is the number 4.082 rounded to nearest hundreth?
iragen [17]
The 2nd number position after the decimal is always the hundredth position, so we will work from there. To round a number, you must examine the number that comes after the number you are trying to round. In this case the number you are trying to round is the 8 so we have to look at the 2. because the two is a number less than 5, the 8 will remain an 8 and your rounded answer is 4.08. If that two had been a number greater than 5 than the 8 would have become a 9 and your answer would have been 4.09. When rounding always remember: "5 to 9, up the line; 0 to 4, down to the floor."
7 0
3 years ago
What is the length of the diagonal of the rectangle? Round to two decimal places
yan [13]

Answer:

Option C

Step-by-step explanation:

By the property of a rectangle,

"All interior angles of a rectangle measure 90°"

Therefore, m∠ABC = 90°

By applying cosine rule in the right triangle ABC,

cos(∠CAB) = \frac{\text{Adjacent side}}{\text{Hypotenuse}}

cos(25°) = \frac{AB}{AC}

AC = \frac{AB}{\text{cos}(25)}

AC = \frac{18}{\text{cos}(25)}

AC = 19.86

Therefore, Option C will be the answer.

3 0
3 years ago
Other questions:
  • What is the perimeter of the shape?
    14·2 answers
  • The midpoint of AB is M(-5,1). If the coordinates of A are (-4,-5), what are the coordinates of B?
    6·1 answer
  • A ball is tossed up in the air at an initial rate of 50 ft/sec from 5 ft off the ground.
    11·1 answer
  • Allen needs to compare a compound for the patient to pick up tomorrow. He needs to mix 2/3 of drug A, with 5/3 of drug B and 9/3
    14·1 answer
  • What is the slope of the line shown below? (4, 8) (2, 4)
    6·2 answers
  • I need help with this one
    12·1 answer
  • 3. Express the mixed recurring decimal 15.732 in p/q form.​
    6·2 answers
  • PLEASE HELP ASAP!!!<br> What is the value of x?<br> Enter your answer in the box<br> x =
    8·2 answers
  • Question 2
    12·1 answer
  • Which has a higher asymptote?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!