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
Mice21 [21]
3 years ago
5

Please help quickly.Thanks :)

Mathematics
1 answer:
Klio2033 [76]3 years ago
5 0
Multiply 2x-5y= -21 by 3 to make it 6x-15y= -63
Multiply 3x-3y= -18 by -5 to make it -15x+15y=90

This cancels the y’s out which leaves us with

6x=-63
&
-15x=90

x for 6x=-63 equals - 10.5 so x is - 10.5 and for -15x=90, x= -6

Then you plug in x into any equation you’d like to find y.

Let’s plug in - 10.5 into 6x... equation.

6(- 10.5)-15y=-63

63-15y= -63
-63 -63

-15y=0
y=0 and x= - 10.5. When you plug in this values it makes the equation true!

But the correct answer is the first one north. Sorry if I’m doing too much hahah


If I’m confusing here’s the right answer...


6x-15y= -63
-15x+15y=90


You might be interested in
If joan reads 96 pages in 4 hours how long will it take her to read 240
vfiekz [6]

Answer:

10 hours to readm240

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
I need help solving this problem
Elina [12.6K]
H = -200
if h divided by 8 is equal to -25, you can multiply -25. by 8, which equals -200. Hopefully this helps!
5 0
3 years ago
0.42 - 4) = 0.24 + 7)
Ronch [10]

Answer:

im sorry if not but i think its 7.24

Step-by-step explanation:

8 0
3 years ago
What is this Find the value of |-6| - 3(42 - 1).
Artist 52 [7]

Answer:

-117

Step-by-step explanation:

So, basically all you have to do is use the absolute values in order to use order of operations and simplify it along with the multiplied grouping.

Hope this helps :)

5 0
3 years ago
In a recent survey, 40 percent indicated chocolate was their favorite flavor of ice cream. Suppose we select a sample of twelve
worty [1.4K]

Answer:

4 people name chocolate

Step-by-step explanation:

Let's first understand the given information.

The survey shows that 40 percent of a finite number of people name chocolate as their favorite flavor of ice cream. Because the survey is reporting a percentage, then 40% means that from 100 people 40 people name chocolate, while the others name a different type of flavor.

Dividing the total of people (100) by the ones who name chocolate (40) then we have:

100/40 = 2.5

Through the above equation we are actually expressing the following:

Total people = 2.5 * (people who name chocolate flavor)

Using this equation if we have now 12 people:

12 = 2.5 * (people who name chocolate flavor)

12/2.5 = (people who name chocolate flavor)

4.8 = people who chose chocolate flavor

Because we can't have 0.8 of a person, then if we have a sample of 12 people, we will expect that 4 of them name chocolate.

5 0
3 years ago
Other questions:
  • Mr. Smith drew an obtuse triangle with side lengths of 4 cm, 6 cm, and 8 cm. In addition to being an obtuse triangle, what kind
    9·1 answer
  • What is 26.833 rounded to the nearest thousandth?
    15·1 answer
  • Please Help  Me With These QUESTIONS!!!!!!! I Give Thanks!!!!!!!
    13·1 answer
  • -1 2/3 divided by -2 1/5
    9·1 answer
  • Tracy would like to buy a mountain bike with an original price of $935.11. Which coupon should she use 550.00 off or 60% off hel
    14·2 answers
  • When would there be only four different equations for a set of math mountain numbers give an example
    8·1 answer
  • What is 4.5(x - 9)= -13.5
    12·1 answer
  • A county fair charges $5 for tickets and $2 for each ride. What is the y-intercept in this scenario?
    12·2 answers
  • 1. I have a tablespoon, but I need a teaspoon. What do I do?
    15·2 answers
  • How many terms are in the following expression? 2x + 5t -6
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!