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
Rus_ich [418]
3 years ago
5

Y=6x+21 -x+3y=12 Find x and y please

Mathematics
1 answer:
rosijanka [135]3 years ago
3 0
For first one
Y=6x+21 can’t be changed
X=y/6-7/2
for the second
X=-12+3y
Y=4+x/3
You might be interested in
Mike thought of a number. He added to it to two other numbers. One of these numbers was 12 less than his number, the other was 1
Inessa [10]

Answer:

number 1  + number 2 + number 3 = 15

Number 1 = x + 12

Number 2 = x - 12

Number 3 = x

(x + 12) + (x - 12) + x = 15

x + 12 + x - 12 + x = 15

x + x + x +12 -12 = 15

3x = 15

x = 15/3 = 5

Check:

Number 1 = 17

Number 2 = 5 -12 = -7

Number = 5

number 1  + number 2 + number 3 = 15

17 + (-7) + 5 = 15

10 + 5 = 15

15 = 15

Answer is 5

Step-by-step explanation:

5 0
3 years ago
A sequence of 7 numbers starts with 8. The second number in the sequence is unknown and may be positive or negative. The third t
scoray [572]

Answer:

4

Explanation:

a_1=8,a_7=0

Since the third term is the sum of the two previous terms

a_3=a_2+a_1

a_7=a_6+a_5

a_7=a_5+a_4+a_4+a_3

Continuing in like manner

a_7=5a_3+3a_2

Since a_3=a_2+a_1

a_7=5(a_2+a_1+3a_2

a_7=5a_2+5a_1+3a_2

a_7=8a_2+5a_1

Recall: a_1=8,a_7=0

0=8a_2+5*8

8a_2=-40

a_2=-5

The sequence is therefore:

8,-5,3,-2,1,-1,0

The sum of the seven numbers is 4.

8 0
3 years ago
What is the midpoint of the x-intercepts of f(x) = (x – 4)(x + 4)? (0,0) (0,4) (–4,0) (2,0)
forsale [732]

Answer:

The midpoint of the x-intercepts of the function is (0, 0)

Step-by-step explanation:

Notice that since the function comes in factor form, we know that its roots (which are actually the intercepts the function has with the x-axis) are: x = 4 and x = -4 (the x-values for which the function renders zero).

These two points are equidistant from the origin of coordinates (0, 0), and therefore the midpoint of these x-intercepts is (0, 0).

6 0
3 years ago
I need help with this problem <br> x²﹣9x﹣15=﹣5
icang [17]

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

x=10,−1

7 0
3 years ago
Read 2 more answers
How many triangles can be constructed with 3 angles, each measuring 63°?
earnstyle [38]

Answer:

0

a triangle's angles should add up to be 180 degrees. Three angles of 63's sum is 189

4 0
3 years ago
Read 2 more answers
Other questions:
  • Alden Has $68.72 saved for vacation. He had more saved, but spent $3.92 on a birthday card for friend. How much had Alde has $68
    7·2 answers
  • Please answer this and thank you<br><br> If DF=78, DE=5x-9, and EF=2x+10, find EF.
    10·2 answers
  • Choose all the doubles facts that can help you solve 8+7
    15·2 answers
  • All outdoor amptitheater has 35 seats in the first row, 37 in the second rwo, and 39 in the thrid row and so om. there are 7 row
    10·1 answer
  • Atlanta and Los Angeles have two of the top ten busiest airports in the world. In 2011, Atlanta had approximately 92.365 million
    12·2 answers
  • Julio has $2.75 in his pocket in nickels and dimes . The number of dimes is 10 less than twice the number of nickels. Find the n
    13·1 answer
  • Please find the length of AB. :)
    13·1 answer
  • A bag contains only red , blue , white and black counters. The number of white is the same as the number of black. The table sho
    11·1 answer
  • Please help! 15 points!
    9·2 answers
  • 1 4 cm 4 cm 5 cm 3 cm Perimeter: Area:​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!