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
Vika [28.1K]
3 years ago
9

Does anyone know 2x=8y=7 4x-2y=9

Mathematics
1 answer:
Fantom [35]3 years ago
5 0
Assuming you mean 2x-8y=7, we can start by multiplying the first equation by -2 and adding it to the second (to cross out the x), resulting in -18y=-5. After that, we can divide both sides by -18, resulting in y=5/18. Next, plugging that into 4x-2y=9, we have 4x-10/18=9. Adding 10/18 to both sides, we get 4x=9+10/18. After that, we can divide both sides by 4, resulting in x=(9+10/18)/4=
You might be interested in
Tom is tiling a wall.
krok68 [10]

Answer:

The correct answer is - £ 40.5 for 3 large packs.

Step-by-step explanation:

Given:

Large pack = 40 tiles £18

Small pack = 28 tiles £14

Special offer = 25% reduction when you buy 3 or more large packs.

Solution:

Following combinations are possible for tom to get the tiles he needs:

1. 3 large packs

40*3 = 120 tiles with 25% discount

cost = 18*3 - 0.25*18*3 = 40.5

2. 4 small packs

28*4 = 112 tiles

cost = 14*4 = 56

3. 2 large packs and 1 small pack

40*2 + 28 = 108 tiles

cost = 18*2 + 14 = 50

4. 1 large pack and 3 small packs

40 + 28*3 = 124 tiles

cost = 18 + 14*3 = 60

Thus, the correct answer is - 1st case with three large packs.

3 0
3 years ago
An ore is 0.75% pure gold. How many kilograms of gold are in 500 kg of ore?
frozen [14]
0.75 x 500 is 375 of gold in 500 kg of ore
8 0
3 years ago
Read 2 more answers
15 points<br> What is the equation of the graph below?
aleksandrvk [35]
We need to see all the given answers
8 0
2 years ago
Max earns $9.30 per hour does part time job how much money will max earn if he works 1,5,8,H hours also how many hours will he w
nataly862011 [7]

Step-by-step explanation:

write a formula that models this.

9.30x = money earned

If he works 2 hours, he'll get $9.30 times (2)

and so on. so you write and solve

9.30(1), 9.30(5), 9.30(8)

for the second part you want to substitute 180 for the amount earned which will become

9.30x = 180 then you solve for x

3 0
2 years ago
Trey is solving his equation, and the last line of his work is "-2 = 2". What does this mean?
oksian1 [2.3K]

Answer:

it means that his equation is not true.

Step-by-step explanation:

-2=2 is obviously incorrect, so we must assume that the equation isn't true.

3 0
2 years ago
Other questions:
  • Suppose a toy rocket is launched vertically upward from the top of a building with an initial velocity of 128 feet per second. i
    8·1 answer
  • Which of the following are in order from greatest to least?
    7·1 answer
  • Write in scientific notation<br> 9,870,000,000,000,000
    10·1 answer
  • It takes an elevator 4 seconds to travel from the first floor to the fourth floor. How long does it take the elevator to travel
    13·2 answers
  • List 2 ways that two-step equations can be used in real life!
    6·1 answer
  • You flip the same coin 900 mores times (1000 total flips). If half of the 900 additional flips are heads and half are tails, wha
    6·1 answer
  • 2) Malik organises an event at the hotel. There will be 80 guests at the event. A
    12·1 answer
  • 23) Find the length of the median of each trapezoid.<br><br> A) 7.4<br> C) 5.6<br> B) 5.8<br> D) 6.1
    8·1 answer
  • What is at least one more reason to use credit?
    13·2 answers
  • Can someone help please
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!