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
Alisiya [41]
3 years ago
10

What is the solution to the system of equations????

Mathematics
1 answer:
prohojiy [21]3 years ago
3 0
First of all, we can solve this by elimination (adding the 2 equations and eliminating 1 variable).
3x+10y=-47
5x+7y=40
It looks like we can eliminate the x by making one 15x, and the other -15x (15 is the least common multiple [LCM] of 3 and 5).
5 (3x+10y=-47) --> 15x+50y=-235
-3 (5x+7y=40) --> -15x-21y=-120
15x-15x = 0, 50y-21y = 29y, -235-120 = -355
0 + 29y = -355
29y/29 = -355/29
y = 12.24
then plugged that into 3x+10y=-47
3x+122.4=-47
3x+122.4-122.4=-47-122.4
3x = -169.4
x = 56.47
Something is wrong... are you sure the 2nd equation wasn't equal to NEGATIVE 40??
Or the 1st one equal to POSITIVE 40??
You might be interested in
Kebdra has a bag containing 15 marbles. She has 3 white, 8 red, 3 blue 1 green. She randomly picks a marble from the bag and the
prohojiy [21]

Answer:

8/15

Step-by-step explanation:

because there are 8 red marbles out of 15 marbles

5 0
3 years ago
Fran has a poster that measures 3/4 square yard in area the length of the poster is 1/3 yard what is the width of the poster
Harrizon [31]

Answer:

9/4 yards

Step-by-step explanation:

A poster is a rectangle.

Area of rectangle = Length × Width

Given:

Area = 3/4 yd

Length = 1/3 yd

Substitute the given values to the equation.

3/4 = 1/3 × w

3/4 = 1/3w

3/4 ÷ 1/3 = w

3/4 × 3/1 = w

9/4 = w

6 0
3 years ago
Kyle ran the race in three and one hundred three thousandths seconds. Which number shows three and one hundred three thousandths
IRISSAK [1]

Answer:

Ran =3,103

Seconds = 1330

Step-by-step explanation:

I got this answer hope its right hope this helps: )

5 0
3 years ago
There are 3/4 of a pizza left over from last night how many 1/8 portions are there
KiRa [710]
3/4 of the pizza is left

3/4 = 6/8

There are 6 "1/8" portions left

hope this helps
8 0
3 years ago
Order from least to greatest
Orlov [11]
Answer: 
In order from least to greatest: 0.25, 3 ⅜, 3 <span>⅖</span>; 

Or, write as: 0.25 < 3 ⅜ < 3 ⅖ .
___________________________________
Explanation:

0.25 =  ¼ l  (less than "1"); the lowest of the three given values. 

The remaining two values have the same whole number of 3, and a fraction:
   3 <span>⅖ ;</span> and 3 ⅜.

The least common multiples among the denominators of the fraction values is 40.   ⅖ = ?/40 ; 5*? =40? 5* 8 = 40, so 2*8 = 16;
Thus, ⅖ = 16/40, and 3 ⅖ = 3 16/40.  3/8 = ?/40? 8*5 =40; so 3*5 = 15 ; thus ⅜ = 15/40; and
and 3 ⅜ = 3 15/40.
3 15/40 is less than than 3 16/40;  
as such; 3 ⅜ is less than 3 ⅖.

So, in order from least to greatest: 0.25, 3 ⅜, 3 ⅖; 
Or, write as: 0.25 < 3 ⅜ < 3 ⅖ .

7 0
3 years ago
Other questions:
  • Based on trends displayed in the graphs above, which answer choice represents a likely situation for 2010? a. There will be more
    5·2 answers
  • The result of two numbers being multiplied together is called the.......?
    9·2 answers
  • I need help please. Assume that one dollor is equal to 1.14 euros. If 500 g of an item is selling for 25 euros, what is its pric
    10·1 answer
  • What’s x-b divided by a= c.. for b
    8·1 answer
  • Simplify: (3+√5)(4-√5)
    15·2 answers
  • 5a+5-3a=13 i needed to make it 20 charatcers
    6·2 answers
  • I don’t understand this
    7·1 answer
  • Someone Help please with work!! 15pts​
    14·1 answer
  • Please helpppp if you can
    11·2 answers
  • 27 percent of the class prefers barbecue chips 2 regular potato chips. If there are 100 students in the class how many students
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!