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
liubo4ka [24]
3 years ago
6

1 Find the value of the expression 4a + 7 when a = 2

Mathematics
2 answers:
CaHeK987 [17]3 years ago
4 0

Answer:

15

Step-by-step explanation:

Gnom [1K]3 years ago
3 0
The answer is obviously 15.
You might be interested in
PLEASE HELP ASAP!! CORRECT ANSWERS ONLY PLEASE!!!
melisa1 [442]

Answer:49 %

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Will someone please help me with these questions. The table shows the average annual cost of tuition at 4-year institutions from
erastovalidia [21]

Step-by-step explanation:

1.) The equation for the line of least squares regression is given by

Y=mX+c

where Y = Output Variable = Average Cost (in thousands of dollars)

           X = Input Variable = Number of years after 2000

Thus, the given data table transforms as follows:

No. of years after            3             4          5           6          7           8             9          10

after 2000 (X)

Average Cost (Y)         15.505   16.510  17.451   18.471   19.363  20.409  21.093 22.092

To determine the equation precisely, we need to calculate the values of 'm' (Slope) and 'c' (Y-intercept)

Let us take any two random values of X and Y from the above table, so that we have

X₁ = 3; Y₁ = 15.505       and      X₂ = 8; Y₂ = 20.409

Plugging in these two sets of values, we get the following two equations:

15.505 = (3)m + c     and

20.409 = (8)m + c

Let us subtract the upper one from the lower one so that we have

20.409 - 15.505 = 8m + c - 3m - c

4.904 = 5m

Hence, m = 0.9808

Using this value and plugging it in one of the above equations yields the value of c as

20.409 = 8(0.9808) + c

Therefore, c = 12.563

So, the required equation for the line of least squares regression is

Y = (0.9808)X + 12.563

2.) To estimate the cost of tuition at a 4-year institution in 2000, we can put the value of X to be 0.

We have Y = 0 + 12.563

Thus, the cost of tuition in 2000 was $12,563.

3.) To estimate the cost of tuition in 2020, we put the value of X as 20 so that we have

Y = (0.9808)(20) + 12.563 = 32.179

Therefore, we can expect the cost of tuition to be as high as $32,179 by 2020.

4.) The slope tells us the factor by which the tuition increases each year, starting with the base of 12,563 dollars in 2000.

One way to lower the cost of college tuition is by applying for a waiver based on income level. Alternatively, one can also work at the school.

One can join a part-time graduation program while working for the rest of the day so that one may support oneself as well as pay for their courses. Alternatively, one can opt for Online Courses and get some Diploma in their area of interest while working part-times so that they may pursue a degree later on in their life.

3 0
3 years ago
Find the quotient 9 3/5 divided 8/15
Whitepunk [10]
The answer is 81/8
Alternative Forms:
10 1/8 or 10.125
4 0
3 years ago
Two trains leave stations 442 miles apart at the same time and travel toward each other. One train travels at 95 miles per hour
Brrunno [24]

(75 + 95) \times x = 442

x =  \frac{442}{75 + 95}  = 2.6

so it takes 2.6 of hours which is the same as 2 hours and 36 minutes for them to reach eachother.

6 0
3 years ago
Evaluate. 7^3 <br> A) 21<br> B) 49<br> C) 81<br> D) 343
Mademuasel [1]
The answer is a 73/3=21
5 0
3 years ago
Read 2 more answers
Other questions:
  • 7 - 3 ( 5t - 10 ) = 67
    6·2 answers
  • Solve the equation x^3 y^'" + 5x^2 y" + 7xy' + 8y = 0
    15·1 answer
  • Can a rational number be a repeating decimal? If so, give an example.
    10·1 answer
  • Which absolute value function has a graph that is wider than the parent function when graphed represents the parent function f(x
    12·2 answers
  • During his summer internship at a major publishing house, Abe prepared a report on contemporary young-adult fiction. As part of
    13·1 answer
  • FF Problem Help
    13·1 answer
  • Which polynomial represents the product of 2m−62m-6 and 4m3−3m−64m3-3m-6?
    5·2 answers
  • Please help me answer this !
    15·1 answer
  • 12x-20y=108 3x+ky=27 what is k
    15·1 answer
  • BRAINLIEST TO CORRECT ANSWER!!!! :) NO links as answers, or you will be reported!! (question 21)!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!