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
k0ka [10]
3 years ago
13

Solve system of equations: 4l + 8m = 40 5l + 2m = 28 Please show steps!

Mathematics
1 answer:
ziro4ka [17]3 years ago
3 0
Answer:

l = 9/2 or 4.5

m = 11/4 or 2.75

Step-by-step explanation:

4l + 8m = 40

8m = 40 - 4I

m = 5 - 0.5l

5l + 2m = 28

5l + 2(5 - 0.5l) = 28

5l + (10 - l) = 28

4l + 10 = 28

4l = 18

l = 18/4 or 9/2

l = 4.5

4l + 8m = 40

4(4.5) + 8m = 40

18 + 8m = 40

8m + 18 = 40

8m = 22

m = 22/8

m = 2.75

You might be interested in
BRAINLIEST WILL I GIVE HURRY
stepladder [879]

Answer:

{10,8}

Step-by-step explanation:

-3x + 4y = -62

4x + 5y = 0

let's eliminate the x

-3x + 4y = -62 | x -4 |

4x + 5y = 0 | x 3 |

12x - 16y = 248

12x + 15y = 0

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

-31y = 248

y = 248/(-31) = 8

since you must do this proble with elimination, we cant use subtitution. so we repeat the way once more to find x (eliminate y)

-3x + 4y = -62 | x 5 |

4x + 5y = 0 | x 4 |

-15x + 20y = -310

16x + 20y = 0

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

-31x = -310

x = -310/-31 = 10

4 0
3 years ago
I need help with this
eduard

Answer:are there choises?

Step-by-step explanation:

4 0
3 years ago
What was the percent increase of China's
Rom4ik [11]

The percentage increase China's population from 1970 to 1995 is: 56.25%.

<h3>How to Calculate Percentage Increase?</h3>

Percentage increase = (Final Value - Original Value)/Original value × 100.

Given the following:

Original value = 0.8 billion

Final Value = 1.25 billion

Final Value - Original Value = 1.25 - 0.8

Final Value - Original Value = 0.45

Percentage increase = 0.45/0.8 × 100 = 56.25%.

Learn more about percentage increase on:

brainly.com/question/14129404

#SPJ1

4 0
2 years ago
Can someone please help me with this​
olasank [31]

Answer:

Surface Area = 139.4 (rounded to nearest tenth)

6 0
3 years ago
What is one property ALL quadrilaterals have ?
polet [3.4K]

Answer:

B

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • -3x − 4 = -2(x + 2) − x
    12·2 answers
  • An earthquake was felt throughout a circular area of 1,808.64 square miles. What was the radius of the circular area?
    8·1 answer
  • An airplane do you sans 1.5 miles to an elevation of 5.25 miles. Find the elevation of the plane before it’s descent.
    12·1 answer
  • A jar contains a mixture of 10 black balls, 8 red balls, and 2 white balls all the same size. What is the probability of drawing
    12·1 answer
  • What is 100,203 in word form
    12·2 answers
  • Consider a simple clock.
    11·1 answer
  • Which is a correct first step for solving this equation? -3x+2−5x−7=4x+2
    15·2 answers
  • Determine whether it is possible to form a triangle using each set of segments with the given measurements.
    14·1 answer
  • 1,267 ÷ 5 <br><img src="https://tex.z-dn.net/?f=1267%20%5Cdiv%205" id="TexFormula1" title="1267 \div 5" alt="1267 \div 5" align=
    6·2 answers
  • write the number of digits in the square root of the 6407522209 i can't solve this question please can you hepl me​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!