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
Svetradugi [14.3K]
4 years ago
10

​−8x+4y=24 ​−7x+7y=28 ​​ What is the solution?

Mathematics
1 answer:
SVETLANKA909090 [29]4 years ago
5 0
​−8x + 4y = 24 -- (1)
​−7x + 7y = 28 -- (2)

Eqn (1) & (2) are simplified as

y - 2x = 6 -- (3)
y - x = 4 -- (4)

By making y the subject of formula in (4), we have

y = x + 4 -- (5)

Substitute x + 4 for y in (3), then

x + 4 - 2x = 6
x - 2x = 6 - 4
- x = 2
x = - 2.

Substitute - 2 for x in (5), then

y = - 2 + 4
y = 2.

Therefore, (x, y) = (- 2, 2) ...Ans.
You might be interested in
Solve x/2 - 3 = 7<br> A. 5<br> B. 10<br> C. 20<br> D. 40
12345 [234]

Answer:

The answer is C.

Step-by-step explanation:

Add 3 to both sides and you will get x/2=10. Multiply by the reciprocal on both sides making x=20.

4 0
3 years ago
Read 2 more answers
It took mama thuli 1,45 hrs to bake her delicious cake.how many minutes did she spend baking?​
3241004551 [841]
How many hours? 1 hour 45 minutes of 145 hours lol?
5 0
3 years ago
What is the mean of the data set?
mestny [16]

Ok, im guessing that this is all about mean

First mean is just adding everything up for example:

5+5+10+10+5

so the answer is 35, but that isnt completely finished you need to divide 35 by 5, or how many numbers were added then you get the mean for my example the mean is 7

------------------------------------------------

ACTUAL PROBLEMS

1. 10+15+14+8+18+11+12+12+10+10+17+16 = 153

153/12= 12.75

2. 16.4+17.1+17.4+18.1= 69 B)

69/4=17.25

3.  11+15+19+17+23+20+17+13+18+21=174

174/11=15.8181818182

4. 21+25+36+16+32= 130

130/5=26

a

6 0
3 years ago
If I have 40 pieces of candy and I sell them all for $20 how much would each piece of candy be worth
Hatshy [7]

Answer:

2cents

Step-by-step explanation:

40/20=2

5 0
4 years ago
Answer needed Answer needed!
Sauron [17]

Answer:

I plotted points since i cant draw lines very well with a mouse

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • You get paid $7.25 per hour for doing yard work. You earned $79.75 last week. Which equation shows how to calculate the number o
    9·2 answers
  • Maggie wants to know how many students in her school enjoy watching sports on TV. She asks all 25 students in her math class and
    7·2 answers
  • Which phrase can be represented by an equation? twice as much as a number 12 less than a number half of a number is 15 the diffe
    5·2 answers
  • All polygons can be decomposed into?
    14·1 answer
  • Do you want to be in your basement bright orange for your birthday party the orange paint shade you like uses three parts red an
    6·2 answers
  • A) 90°
    14·2 answers
  • tom and adam have a total of 240 stamps.The ratio of the number of tom's stamps to adam's is 3:7.Tom buys some stamps from Adam.
    5·1 answer
  • True or False: When a preimage rotates 1/4
    5·2 answers
  • Lisa sliced 12 cakes. Each chocolate cake had 6 slices and each lemon cake had 5 slices. If Lisa made 70 slices in total, how ma
    9·1 answer
  • 51 divided by 5367? Help
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!