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
Anika [276]
3 years ago
7

This is all I know what to do any help?

Mathematics
1 answer:
svetoff [14.1K]3 years ago
4 0
You can multiply the second equation by -2 

-5x + y = 15         everything by -2

10x - 2y = -30

now you can solve them

2x + 2y = -6
10x - 2y = -30

y cancels

2x= -6
10x = -30


12x = -36
/12.     /12

x = -3 


now to solve for y you substitute x for -3

-5(-3) + y = 15
15 + y = 15 
-15        -15

       y= 0
You might be interested in
A length of 9 and<br> a perimeter of 22
Bad White [126]

Answer:

Width is 2 if that's what you were looking for.

Step-by-step explanation:

I'm guessing it's a rectangle and you want the width?

22-9-9=2w

2w=4

The width is 2

4 0
3 years ago
Original:45 new:30 percent of change
Sveta_85 [38]

<u>Answer:</u>

<h2>-33.33%</h2>

<u>Explanation:</u>

30-45 = -15

percent of change = 100(-15/45) = -33.33%

6 0
3 years ago
-4y = 16 <br> identify the slope and y intercept
Shalnov [3]

Answer:

zero slope

y-intercept at y = -4

Step-by-step explanation:

-4y = 16  (divide both sides by -4)

y = 16 / (-4)

y = -4

y = -4 represents a horizontal line that is parallel to the x-axis that crosses the y-axis at y = -4

hence the slope of a horizontal line is zero, and the y-intercept is -4

3 0
3 years ago
Read 2 more answers
In a 400 meter race, 4 runners pass a baton as each of them runs 100 meters of the race. The table shows the split times for the
kati45 [8]

Answer:

Since the equation is addition, reverse it into subtraction. 210-53.715-51.3-52.62= 52.365. You can add 53.715 by 51.3 by 52.62 by 52.365 to check your answer, and it will be 210 so the 4th runner ran 52.365 seconds.

i also got this question but i figured it out lol

7 0
3 years ago
Here are eight angles. Which of these angles are acute angles?
Alexeev081 [22]

Answer:a and b

Step-by-step explanation:an acute angle in small, an acute angle will always be smaller then C

5 0
3 years ago
Other questions:
  • Cindy was asked by her teacher to subtract 3 from a certain number and then divide the result by 6.Instead she subtracted 6 and
    12·2 answers
  • Convert 72°F to °C (to the nearest tenth) using one of the following formulas: F = 9/5xC + 32 or C = (F - 32) x 5/9.
    13·2 answers
  • A battery can run for 120 hours supplying a current of 148 milliamps mA. What is the capacity of the battery in amp-hours Ah? Th
    6·1 answer
  • Does anyone know this
    9·1 answer
  • What is 276,485 rounded to the nearest hundred thousand?plzzzzzz answer
    9·2 answers
  • I need help solving this problem, please respond as fast as you can.<br><br> -7 – 3x = 1x + 4(2 + x)
    11·1 answer
  • PLEASE I NEED HELP ‼️ I have 20 minutes and I don't get anything
    14·1 answer
  • Can someone me my valentine uwu
    13·2 answers
  • C is the circumcenter of isosceles triangle ABD with vertex angle ABD. Does the following proof correctly justify that triangles
    10·1 answer
  • Show the number on a number line:<br> -12 ÷ 4 =
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!