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
g100num [7]
2 years ago
10

X + y = 21 3x – 2y = -12

Mathematics
2 answers:
kondaur [170]2 years ago
8 0

Answer:

x = 6 y = 15

Step-by-step explanation:

If this is simultaneous equations

x+y=21

3x-2y= -12

-3(x+y=21)

1(3x-2y= -12)

-3x -3y= -63

3x-2y= -12

-5y= -75

y= -75/-5

y= 15

x+y=21

x+15=21

x=21-15

x=6

Varvara68 [4.7K]2 years ago
7 0
This is the answer !!!!!!!!!!!

You might be interested in
Kelly is making a chart to show her parents that the number of minutes she spoke on her cell phone decreased over the last 5 mon
Arturiano [62]
The choice isB
all the numbers in that choice decrease in numerical order
4 0
3 years ago
What is the measure ??
alexandr402 [8]
Welcome

d the answer is 73 degrees
114 - 41 = 73
5 0
3 years ago
What part of the circumference is an arc whose measure is 30°?
Radda [10]
Circumference of a circle:
C = 2 r π;
Length of an arc:
L = r π α / 180°
L = r π · 30° / 180° = r π /6
r π /6   :   2 r π = 1/6 : 2 = 1/12
Answer: A ) 1/12 
7 0
3 years ago
a box contains 20 red, 10 blue and 30 yellow beads. what is the probability of a bead drawn at random being yellow or blue?​
dexar [7]

Answer:

2/3

Step-by-step explanation:

1. add all the beads up together:

    20+10+30= 60

2. add the blue and yellow beads up:

    10+30= 40

3. put 40 over 60

    40/60 which equals 2/3

4. the final answer:

    2/3

5 0
2 years ago
Which functions have an axis of symmetry of x = -2? Check all that apply. A. f(x) = x^2 + 4x + 3 B. f(x) = x^2 - 4x - 5 C. f(x)
Snowcat [4.5K]

Answer:

A. f(x) = x^2 + 4x + 3

D. f(x) = -2x^2 - 8x + 1

Step-by-step explanation:

The axis of symmetry is found by h = -b/2a  where ax^2 +bx +c

A. f(x) = x^2 + 4x + 3

  h = -4/2*1 = -2    x=-2

B. f(x) = x^2 - 4x - 5

h = - -4/2*1 = 4/2 =2  x=2  not -2

C. f(x) = x^2 + 6x + 2

h =  -6/2*1 = -3/2 =  x=-3/2  not -2

D. f(x) = -2x^2 - 8x + 1

h = - -8/2*-2 = 8/-4 =-2  x=-2  

E. f(x) = -2x^2 + 8x - 2

h = - 8/2*-2 = -8/-4 =2  x=2  not -2

7 0
2 years ago
Other questions:
  • Mr. Simpson spent 5 hours working on his lawn. If he spent 25% of the time edging the flower beds, how much time did he spend ed
    12·2 answers
  • X/-2=10 (one step equations )
    13·2 answers
  • A motorist is pumping gas into his car at a rate of 5/12 of a gallon every 1/24 of a minute. At this rate how many gallons of ga
    8·2 answers
  • ***PLEASE HELP***
    5·1 answer
  • HELP PLEASE!! ill give brainiest <3
    15·2 answers
  • The perimeter of a rectangle is 8x+10.if the length is 2x+8 what is the width?
    6·2 answers
  • PLEASE HELP-
    9·2 answers
  • What is the value of the expression 1/2(12.g)-h when g=1/4 and h=1/2​
    14·1 answer
  • Which table represents the statement "A car is traveling at a rate of 60 miles per hour"?
    13·2 answers
  • Hi guys I need help rq with this thanks
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!