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
hoa [83]
3 years ago
7

Solve by elimination

Mathematics
2 answers:
inna [77]3 years ago
4 0
2x - 2y = -4
-3x -3y = 0
_____________________
-1x - 5y = -4

Serggg [28]3 years ago
4 0
2x-2y=-4
Multiply eq.by 3
6x-6y=-12
-3x-3y=0
Multiply eq.by 2
-6x-6y=0
from both new eq.
6x-6y=-12
-6x-6y=0
So adding both eq. We get
-12y=-12
So y=1
From eq.1
2x-2y=-4
2x-2(1)=-4
2x-2=-4
2x=-4+2
2x=-2
x=-1
so x=-1 and y=1
You might be interested in
#40 please! Thank you.
lisov135 [29]
Well he and the cart together weigh: 210+95=305.
The weight left for boxes is: 4,000-305=3,695.
Total weight of boxes is: 50·275=13,750.
Divide the weight of boxes by how much is left for the elevator: 13,750/3,695=3.72
Since 3.72 is more than 3 he would have to make 4 trips to safely do so :)
5 0
3 years ago
If the area of a triangle is 36 in.^2in.
disa [49]
C. 8 inches. I hope I'm not too late
4 0
2 years ago
Find the perimeter of each figure?
Levart [38]
11- 59.1. Got the Answer for #11, but for #12 you lowkey should just use any type of calculator for that shape
8 0
3 years ago
Read 2 more answers
The price of a certain painting increased by 20% during the first year and decreased by 15% during the second year. The price of
Rina8888 [55]

Answer:

A.102%

Step-by-step explanation:

Let cost price of painting=$100

In first year price increased 20%

Then , the price=100+100(0.20)=$120

In second year

Price decreased 15%

Then , the price of painting=120-120(0.15)

The price of painting=$102

Percent =\frac{final\;price}{Initial\;price}\times 100

By using this formula

Then, we get

Percent of the original price=\frac{102}{100}\times 100

Percent of the original price=102%

Option A is true.

8 0
3 years ago
Easy question for all the points?
kaheart [24]

Answer:

D

Step-by-step explanation:

Height: h

Length: 2h + 15

Area = length × width

4h² + 42h + 90

2(2h² + 21h + 45)

2[2h² + 15h + 6h + 45]

2[h(2h + 15) + 3(2h + 15)]

2(h + 3)(2h + 15)

Width = 2(h+3) = 2h + 6

Length: 2h + 15

Difference:

(2h + 15) - (2h + 6)

2h + 15 - 2h - 6

9

Width is 9 feet shorter than the length

8 0
3 years ago
Read 2 more answers
Other questions:
  • Need help on questions 5-8 with work and answers plz i will really be very greatful
    7·1 answer
  • Is 7.24979 a rational number
    10·1 answer
  • Given a right triangle with legs a, b and hypotenuse c, solve for a if b= 20 and c= 29
    13·2 answers
  • 0.3434343434<br> What is this as a fraction
    8·1 answer
  • What is 99mutyply by 87
    14·2 answers
  • Please help me quick! I need this before tomorrow!
    5·1 answer
  • Tentukan hasil dari 12 x (-5) + (-18) : (-3)
    14·1 answer
  • What is the answer<br><br> expand and simplify 3x-2^2
    9·1 answer
  • What is Y=-2x+50 graphed
    12·1 answer
  • PLEASE HELP I NEED IT TO PASS THIS CLASS
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!