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
grin007 [14]
2 years ago
8

Please solve this question ​

Mathematics
1 answer:
Alchen [17]2 years ago
4 0

Answer:

(3, 4 )

Step-by-step explanation:

3x - y = 5 → (1)

x + y = 7 → (2)

adding the 2 equations term by term will eliminate y

4x + 0 = 12

4x = 12 ( divide both sides by 4 )

x = 3

substitute x = 3 into either of the 2 equations and solve for y

substituting into (2)

3 + y = 7 ( subtract 3 from both sides )

y = 4

solution is (3, 4 )

You might be interested in
Find the sum using fraction bars or a paper and pencil. Write your answer in simplest form.
vlabodo [156]
Find the LCD = 18

5/6 = 15/18
3/9 = 6/18

15/18 + 6/18 = 21/18 = 7/5 or 1 2/5
3 0
3 years ago
In your biology class, your nal grade is based on several things: a lab score, scores on two major tests, and your score on the
Mariana [72]

Complete Question

In your biology class, your final  grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 25% of your total grade, each major test is worth 22:5%, and the final exam is worth 30%. Compute the weighted average for the following scores: 92 on the lab, 81 on the first major test, 93 on the second major test, and 85 on the final exam. (Enter your answer to one decimal place)

Answer:

The weighted average is  W = 87.65

Step-by-step explanation:

From the question we are told that

  The worth of the lab score is  25% of total grade

  The worth of each major  test is   22.5% of total grade

   The worth of final exam is  30% of total grade

The  score on lab is  92

The score on first major test 81

The score on second major test 93

 The score on final  exam is  85

Generally the weighted score is mathematically represented as

     W = 0.25 *  92 + 0.225* 81 + 0.225* 93 +0.30 * 85

=> W = 0.25 *  92 + 0.225* 81 + 0.225* 93 +0.30 * 85

=> W = 87.65

   

   

3 0
3 years ago
3a2+4b for a=2 and b=3
Kobotan [32]
First you’ll multiply to get 3x2x2 + 4x3. Then add them together. 12+12=24
4 0
3 years ago
In Tyrone's science class he is studing cells. Cell A divides every 30 minutes. If Tyrone starts with two cells, how many cells
SashulF [63]
In 1 hour you'll have 4 cells so multiply that by 3 and you will have 12 cells in 3 hours
5 0
3 years ago
A person has a mass of 70 kg. Express this mass in g.​
yulyashka [42]
70000 grams in total
7 0
3 years ago
Other questions:
  • What are the zeros of the polynomial
    15·1 answer
  • makayla's local movie theater has a movie goer club that charges an annual registration fee of $25. however, movie tickets are d
    10·1 answer
  • Please help what is the value of x
    14·2 answers
  • Two numbers have the same digits in the millions period, the same digits in thousands period, and the same digits in the ones pe
    10·1 answer
  • 5 projects require 53 paving stones about how many stones are needed for all of the projects​
    14·2 answers
  • Joe needs to read 4 novels each month.
    7·1 answer
  • It went down 18 floors then up by 23 floors. What floor is the
    9·1 answer
  • PLS HELP FAST! FIRST ANWSER GET BRAINLYIST!
    10·2 answers
  • I will mark you brainiest if you can answer this
    14·1 answer
  • Can someone please explain how to do the complex algebraic equation? I couldn't find any answers online
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!