answer.
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
morpeh [17]
2 years ago
10

Ella simplifies (3b+4r)+(-2b-r) and says the result is b+5r. what error did ella make

Mathematics
2 answers:
Bezzdna [24]2 years ago
6 0
Ella incorrectly combined the<em> r</em> coefficients. <span> The correctly simplified expression is <em>b + 3</em><span><em>r</em></span></span>
inysia [295]2 years ago
4 0
She added 4r and ,+r instead of 4r and -r
You might be interested in
Arthur took out a 20 year loan for $60,000 at an APR of 4.4% compounded monthly. Approximately how munch would save if he paid i
Eduardwww [97]
Monthly payments, P = {R/12*A}/{1- (1+R/12)^-12n}

Where R = APR = 4.4% = 0.044, A = Amount borrowed = $60,000, n = Time the loan will be repaid

For 20 years, n = 20 years
P1 = {0.044/12*60000}/{1- (1+0.044/12)^-12*20} = $376.36

Total amount to be paid in 20 years, A1 = 376.36*20*12 = $90,326.30

For 3 years early, n = 17 year
P2 = {0.044/12*60,000}/{1-(1+0.044/12)^-12*17} = $418.22

Total amount to be paid in 17 years, A2 = 418.22*17*12 = $85,316.98

The saving when the loan is paid off 3 year early = A1-A2 = 90,326.30 - 85,316.98 = $5,009.32

Therefore, the approximate amount of savings is A. $4,516.32. This value is lower than the one calculated since the time of repaying the loan does not change. After 17 years, the borrower only clears the remaining amount of the principle amount.
8 0
2 years ago
Read 2 more answers
Which statements correctly describe the cosine and sine functions? Check all that apply. The cosine function increases on (90°,
Jet001 [13]

Answer:

The three correct answers are B "The sine function increases on (0°, 90°) and (270°, 360°)." , E "Both the cosine and sine functions have a maximum value of 1.", and F "Both the cosine and sine functions are periodic."

Step-by-step explanation:

Hope this helps <3

4 0
2 years ago
Zöe schedules advertising for a radio station. She must fill 12 minutes each hour with 30 second ads and 60 second ads. Zöe sold
PilotLPTM [1.2K]
I cannot see Zoe's work to explain the error, but the correct method of solving is listed:

x is the number of 30-second ads
y is the number of 60-second ads

x+y=12(60)=720 would be the first equation; this is because while the ads together make 12 minutes, the ad times are in seconds.  This means we must multiply 12 by 60.

y=2x is the second equation

Our system is then
x+y=720
y=2x

We will use substitution to solve this.  Plug 2x in place of y in the first equation:
x+2x = 720

Combine like terms:
3x = 720

Divide both sides by 3:
3x/3 = 720/3
x = 240

Substitute this value in for x in the second equation:
y=2(240)
y=480
8 0
2 years ago
The triangles shown below must be congruent. True or false
Alex777 [14]
The correct answer to your question is false. this is because congruent triangles must have the same 3 angles and the same 3 sides, and while these triangles have the same angles, they dont have the same sides.
let me know if you have any other questions
:)
4 0
2 years ago
Read 2 more answers
Researchers are assessing a new screening tool (blood-based assay) for early identification of prostate cancer. The test is run
natima [27]

Answer: B. Accurate but not reliable

Step-by-step explanation:

An experiment is said to be "reliable" when it consistently gives the same answers when done repeatedly, when the experiment is carried out several times it gives the same result each times.

An experiment is said to be " accurate "

when it produce a correct result using the right procedure and method .

In this case the research assessing a new screening tools for early identification of prostate cancer, test result is "accurate but not reliable ", since the consistent test result was not accurate.

7 0
2 years ago
Other questions:
  • Once a week, Ms.Conrad selects one student at random from her class list to win a "no homework" pass. There are 17 girls and 18
    9·1 answer
  • Which of the following equations correctly represents the law of sines?
    7·1 answer
  • What is the sum of 4.108 and 15.23
    14·1 answer
  • A theater group made appearances in two cities. The hotel charge before tax in the second city was $1000 lower than in the first
    5·1 answer
  • The function y = square root sign x is translated using the rule (x, y) → (x – 7, y + 2)to create f(x). What is the domain of f(
    11·2 answers
  • Ellen said she spent half her money for lunch and half of what was left for a movie. She now has $1.20. How much did she spend f
    14·1 answer
  • Each of the 110 students in a statistics class selects a different random sample of 35 quiz scores from a population of 5000 sco
    15·1 answer
  • Find the values of a through e that make these two relations inverses of each other. a = b = c = d = e = An image shows 2 tables
    11·2 answers
  • Match the following guess solutions ypyp for the method of undetermined coefficients with the second-order nonhomogeneous linear
    13·1 answer
  • 1. Janna works at a lab with a huge circular particle accelerator. It has a radius of 4 kilometers. What is the accelerator's di
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!