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
Ghella [55]
3 years ago
15

AdhkjAhkmhdj help me please

Mathematics
1 answer:
kirza4 [7]3 years ago
7 0
4x+2x=84
3x+5y=126
5x+4y=?
--------------------
cerco la x nella prima equazione:
4x+2y=84 
x=(84-2y)/4
x=(42-y)/2
-------------------------------------------------------------------------
cerco la y nella seconda equazione, sostituendo la x:
3x+5y=126
3[(42-y)/2]+5y=126
y= -18
------------------------------------------------------------------------
cerco la x della nella equazione, sostituendo la y:
4x+2y=84
4x+2(-18)=84
x=30
---------------------------------------------------------------------------------------------------
cerco i totale nella terza equazione, sostituendo i valori della x e della y:
5x+4y= ?
5*30 + 4*(-18)= 150-72 = 78

You might be interested in
5.5 + 2.1x + 3.8x – 4.1
lozanna [386]

Answer:

5.9x + 1.4

Step-by-step explanation:

5.5 + 2.1x + 3.8x - 4.1

= 5.9x + 1.4

4 0
3 years ago
Read 2 more answers
Deepak is using blocks to represent the four operation on 8 and 2 witch operation will require the greatest number of blocks
Vadim26 [7]

Answer:

18

Step-by-step explanation:

8 0
3 years ago
(1/8 + 3/12) x (1 1/6-1/2)
aivan3 [116]

Answer:

1/2

Step-by-step explanation:

(1/8+3/12)×(11/6-1/2)

Using bodmas

Deal with the bracket first and it should start with the addition

1/8+3/12

Lcm of the two is 96

12+24/96

=36/96

Then move to the next bracket

11/6-1/2

Lcm is 6

11-3/6

=8/6

Bring the two answers together

36/96×8/6

=1/2

5 0
3 years ago
Read 2 more answers
A local university produced a study in which it chose 1000 students to participate. The study asked each student to write down t
oee [108]

it is REPLICATION !!!!!!!!!!!!!!!      

4 0
3 years ago
Read 2 more answers
At 186282 miles per second, how far does light travel in a year? Give your answer in miles, but use scientific notation, which e
zlopas [31]

Answer:

Use dimensional analysis to answer each of the following questions. To find the distance light travels in a year for part a, convert sec to yr by using unit ratios with min, hr, and days in their denominators. Thus, a light year is approximately 5,874,589,152,000 mi

6 0
3 years ago
Other questions:
  • What is the constant proportionally of y=2.5x
    11·2 answers
  • If there are 29 males for every 35 females at the 7th grade dance, what are three possible ways to write this ratio?
    8·1 answer
  • Which expression is equivalent to -32 to 3/5 power
    8·1 answer
  • What is 4.05 less than 7.6?
    6·2 answers
  • A jar holds no more than 500 buttons. If 5 people bring 330 buttons each, how many jars are necessary to hold all of the buttons
    10·1 answer
  • The amount of W water used varies directly with the population N of people. City A has a population of 468,000 people and used 3
    12·1 answer
  • What is the measure of Angle z?
    11·1 answer
  • Help asap !! will get branliest.​
    9·1 answer
  • If eight is added to four times a number the result is 96
    14·1 answer
  • It’s due late tonight can some pls help me pass
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!