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
uysha [10]
2 years ago
15

6x-5y = 15 x=y+3 x= y=

Mathematics
1 answer:
Zina [86]2 years ago
6 0

Answer:  x = 0  y = –3

Step-by-step explanation:

We can solve this system by substitution.

use the second equation as a value for x.

Then substitute that value  in place of x in the first equation and solve for y.

6x - 5y = 15 becomes

6(y + 3) - 5y = 15  Distribute 6 × parentheses

6y + 18 - 5y = 15 combine like terms

6y -5y + 18 = 15

y + 18 = 15   Subtract 18 from both sides.

y =15 -18

y = –3

Use this value for y in either equation to solve for x

6x - 5(-3) = 15

6x + 15 = 15    Subtract 15 from both sides, divide by 6 (seems silly!)

x = 0

OR in he second equation,

x = -3 + 3  

Again, x = 0

You might be interested in
Which function is the inverse of ?<br> f(x)=50,000(0.8)^x
IrinaK [193]
Answer:

<span>y=<span><span><span>log<span>(x)</span></span>−<span>log<span>(50000)</span></span></span><span>log<span>(0.8)</span></span></span></span>

Explanation:

write as : <span>y=50000<span><span>(0.8)</span>x</span></span>

Taking logs:

<span><span>log<span>(y)</span></span>=<span>log<span>(50000)</span></span>+<span>log<span>(.<span><span>(0.8)</span>x</span>.)</span></span></span>

But <span>log<span>(.<span><span>(0.8)</span>x</span>.)</span></span> is the same as <span>x<span>log<span>(0.8)</span></span></span>

Thus
<span>x=<span><span><span>log<span>(y)</span></span>−<span>log<span>(50000)</span></span></span><span>log<span>(0.8<span>)

</span></span></span></span></span>Now swap the x'x and the y's giving:<span><span><span><span><span>
</span></span></span></span></span>

<span>y=<span><span><span>log<span>(x)</span></span>−<span>log<span>(50000)</span></span></span><span>log<span>(0.8<span>)

my teacher helped a little bit


</span></span></span></span></span>

4 0
3 years ago
What is the value of x?<br><br> 16<br> 50<br> 130<br> 164<br> Please hurry !!!
Dmitry_Shevchenko [17]
C) 130 i hope this helps good luck 
6 0
3 years ago
Read 2 more answers
for the equation 2x(3x+5)+3(3x+5)=ax^2+bx+c , if this equation is true for all values of x,what is the value of b if a,b,and c a
guapka [62]

Answer:

b=19

Step-by-step explanation:

2x(3x+5)+3(3x+5)=ax2 +bx+c

by expansion,

6x2 +10x +9x+15=6x2 +19x +15

6 0
3 years ago
Please help this is Science.
monitta
C. velocity includes the direction of travel whereas speed does not.
6 0
2 years ago
Read 2 more answers
Find f (0) if f(t) = t2 – 2t – 5.
Sonbull [250]
Answer is -5.

Explanation- Since t equals 0. You put 0 in place of every t.

0(2)- 2(0)- 5 =
0-0-5= -5
8 0
3 years ago
Read 2 more answers
Other questions:
  • Please answer correctly !!!!! Will mark brainliest !!!!!!!!!!
    10·1 answer
  • A map has a scale of 1 cm : 20 km. Two cities are 2.5 cm apart on the map. To the nearest tenth of a kilometer, what is the actu
    12·1 answer
  • I need help plz ASAP
    14·1 answer
  • What is m a(3x+13)degrees b(x-8)degrees<br><br> Enter your answer in the box
    10·2 answers
  • What fraction would represent the number 3.45
    15·1 answer
  • What is the next term of the arithmetic sequence?<br> 2,-1,-4,-7,-10
    8·1 answer
  • The seventh-grade class is selling boxes of votive candles as a fundraiser. The first box purchased costs $14.00, and each addit
    14·1 answer
  • Question in the picture
    7·2 answers
  • Is the following relation a function?<br><br> YES NO
    7·1 answer
  • Find the mass at time t=0. ANSWER HAS TO BE IN GRAMS
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!