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
natima [27]
3 years ago
10

Solve this system of equations. y = 5x +20 and y = -2x -8

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
3 0

Answer:

y = 0

x = -4

( x, y ) = ( -4 , 0 )

Step-by-step explanation:

y = 5x + 20

y = -2x - 8

Substitute

5x + 20 = -2x - 8

Add 8 on both sides

5x + 20 + 8 = -2x - 8 + 8

5x + 28 = -2x

Subtract 5x on both sides

5x - 5x + 28 = -2x - 5x

28 = -7x

Divide by -7 on both sides

28/-7 = -7x/-7

-4 = x

Now that you have x, you can substitute it in one of the equations that was given to find the value of y.

y = 5x + 20

y = 5(-4) + 20

y = -20 + 20

y = 0

Or....

y = -2x - 8

y = -2(-4) - 8

y = 8 - 8

y = 0

They will both be 0 no matter what

Point form = ( -4, 0 )

Hope this helped

You might be interested in
PLS HELP FAST IM BEING TIMED!!!
Lina20 [59]

Answer:

C

Step-by-step explanation:

hope it helps

6 0
3 years ago
Read 2 more answers
Someone painted 2/5 of a wall with 1/3 of a gallon of paint how much will they need to paint the rest of the wall? math problem
Allisa [31]
2/5+1/3=3/8(paint)-rest
7 0
3 years ago
Please help I’m honestly gonna cry lol
BARSIC [14]

Answer: 2z-15

Step-by-step explanation

Based on the visual image, AD is a line where a point O intersects somewhere on the line. AD is represented as 3z-11, while the segment from AO is represented as z+4.

In order to find the answer, we must subtract the entire line (AD) from AO in order to find the missing segment OD.

AD    -  AO   = OD

(3z-11) -  (z+4) = OD

Distribute the negative sign so it becomes:

(3z-11) -z - 4 = OD

Now combine like terms.

(3z-z) +(- 11 -4)= OD

2z - 15 = OD

And that is your answer!

6 0
2 years ago
Evaluate 4x^2-12x+5 at x=6. A. 67 B. 77 C. 105 D. 221
Kamila [148]

Answer: B. 77

Sub x =6 into the given expression

4x^2 - 12x + 5

= 4(6)^2 - 12(6) + 5

= 144 - 72 + 5

= 77

3 0
2 years ago
When and how do you use logarithms to solve exponential equations? give an example of an exponential equation that does not requ
tatuchka [14]
\bf 5^{x+3}=\cfrac{1}{125}\implies 5^{x+3}=\cfrac{1}{5^3}\implies 5^{x+3}=5^{-3}
\\\\\\
\textit{because the bases are the same, the exponents must also be the same}
\\\\\\
x+3=-3\implies \boxed{x=-6}\\\\
-------------------------------\\\\
3^x=4^{2x}\implies log(3^x)=log(4^{2x})\implies xlog(3)=(2x)log(4)
\\\\\\
\cfrac{x}{2x}=\cfrac{log(4)}{log(3)}\implies \cfrac{1}{x}=\cfrac{log(4)}{log(3)}\implies \cfrac{log(3)}{log(4)}=x\implies \boxed{0.79248125\approx x}
6 0
2 years ago
Other questions:
  • Dr. Watson combines 400 mL of detergent 800 ml of alcohol and 1500 mL of water how many liters of solution does he have
    8·1 answer
  • Gary owns a taco truck. He charges $3.49 for a nacho taco and $4.99 for a cool ranch taco. How much does Gary make if 15 nacho t
    12·1 answer
  • Write the equation of the line that is parallel to y=3x+1 that passes through (2,3)
    6·1 answer
  • Find the surface area of the rectangular and triangular prisms
    6·1 answer
  • A manufacturing company with 450 employees begins a new product line and must increase their number of employees by 18% how many
    8·1 answer
  • What is the reciprocal of 7/g
    6·1 answer
  • Unlabeled polygon what is the scale factor of a
    5·1 answer
  • HELP QUICKLY!!
    9·1 answer
  • Find the slope and y-intercept<br> and write the equation.<br> (-98, 22), (0, -48)<br> m =<br> b=
    9·1 answer
  • Last year, 9 companies decided to include their coupon in a local coupon pack. Each company had to print 589 copies of their cou
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!