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
Marianna [84]
3 years ago
6

Becky and tommy are asked to solve -4x-25=8x+15 identity where one of them made an error

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

Procedure to solve the equation in one variable

-4 x-25= 8 x+15

Taking variable on one side and constant on another side of equation

- 4 x - 8 x = 15 + 25(When one quantity goes on other side of equation , the sign preceding it changes)

- 12 x= 40

x = \frac{40}{-12}=\frac{-10}{3}

By looking at the solution described above , you can find yourself who has done the mistake between Becky and Tommy and  can also identify the error and rectify it.

ololo11 [35]3 years ago
3 0
I feel sorry for Becky and Tommy. The one who didn't come up with x=-10/3 made an error.

first bring 8x to the left and -25 to the right and simplify:

-4x-8x = 25+15 => -12x = 40

x = -40/12 = -10/3
You might be interested in
1) Omar has scored 85, 71, and 77 on the first three exams in his math class. If the standard 70,80,90 scale is used for grades
Rus_ich [418]

Answer:

a. 47

b. 87

c. 127

Step-by-step explanation:

Assume a total of 4 exams ( first 3 plus a final)

Let final score be X,

Hence,  average score = (85 + 71 + 77 + x) / 4 = (233 + x) / 4

a) to get a C, the average score must be 70

70 = (233 + x) / 4

(233 + x) = 70 (4) = 280

x = 280 - 233 = 47 (Ans)

b) to get a B, the average score must be 80

80 = (233 + x) / 4

(233 + x) = 80 (4) = 320

x = 320 - 233 = 87 (Ans)

c) to get a A, the average score must be 90

90 = (233 + x) / 4

(233 + x) = 90 (4) = 360

x = 360 - 233 =  127 (Ans)

6 0
2 years ago
A dinner plate has a diameter of about 9 inches what is the circumference and area?
lukranit [14]
Circumference~(pi)(diameter)~28.26
Area~ (pi)(radius)squared~63.59
I believe these are right
7 0
3 years ago
Read 2 more answers
(5x10^3)x(9x10^7) can someone please answer this for me.
Anna11 [10]
4.5 times 10^10

1. Multiply 5times ten to the third

2. Multiply 9 times ten raised to the seventh

Then multiply them together
5000 times 90000000
5 0
3 years ago
What is the solution of -8/2y-8=5/y+4-7y+8/y2-16
omeli [17]
The answer would be -0.102564 repeating because if you do the math before dividing you would get -8/6.5/-1.5/-8

3 0
3 years ago
What is the number of rolls of paper used per wall
Black_prince [1.1K]
Sizes? Of the wall and paper?
5 0
3 years ago
Other questions:
  • Which of the following equations is in standard form?
    13·2 answers
  • 3. The grade a student earns on a test varies directly with the amount of time the student spends studying. Suppose a student sp
    14·1 answer
  • If n is an odd number greater than or equal to 3, can n + 1 ever be prime? What if n equals 1?
    7·1 answer
  • Compute the mode, median, and mean for 23455
    14·1 answer
  • Find the first six terms of the sequence. a1 = -8, an = 5 • an-1
    8·1 answer
  • Triangle A = 12 bh<br>Find the area<br>of the triangle<br>base 15in height 3in<br>A =​
    15·1 answer
  • Mrs.Turner baked 120 cookies. She decided to give 1/6 of them to her students. How mqny did she take to her students
    14·2 answers
  • If data set A has a larger standard deviation than data set B data set A is lees spread out than data set B
    7·1 answer
  • Nick bought 17 hamburgers for his friends. Each hamburger cost him $1.91, including tax. Which is the best estimate of the total
    9·2 answers
  • You want to get a bag of Halloween sweets, the sweets are 8.50 but are 24% off. How much will the sweets be with 8% tax included
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!