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
crimeas [40]
3 years ago
10

- If 2x2 + 8y = 121.5 and x2 - 8y = 121.5, then x = 9 6.36 16 7

Mathematics
1 answer:
Natalija [7]3 years ago
4 0

Step-by-step explanation:

2x² + 8y = 121.5

x² - 8y = 121.5

Add the equations together to eliminate the y terms.

3x² = 243

x² = 81

x = 9

You might be interested in
write the equation of the line, with the given properties, in slope-intercept form. slope = -5, through (-4,4)
Daniel [21]

Answer: y=-5x-16

Step-by-step explanation:

Since we are given the slope and the point, we can plug in the point to solve for y-intercept.

4=-5(-4)+b          [multiply]

4=20+b               [subtract both sides by 20]

b=-16

Now, we know the equation is y=-5x-16.

3 0
3 years ago
R0-180(x, y) maps to the same point as 80,180(x, y).<br> True<br> False
mariarad [96]
The anser is false that what i think ):):(:(:(:(:(:
6 0
3 years ago
Mylia has 20.65 m of wire. She used 15.8 m to make a sculpture. She cut the rest of the wire into 3 equal parts. What is the len
deff fn [24]

Answer:

1.6 meters

Step-by-step explanation:

20.65-15.8=4.85

4.85/3=1.6

5 0
2 years ago
What formula is required
Yuliya22 [10]
The formula required is tangent
8 0
3 years ago
Graph y = −x2 − 2. Identify the vertex of the graph. Tell whether it is a minimum or maximum.
Kitty [74]
Y  = - x^2 - 2

the vertex of - x^2 will be at (0,0)
the -2 translates the graph down 2 units

The answer is the vertex is at (0,-2)  and  as the coefficient of x^2 is negative it is a maximum

Answer is  D.


8 0
3 years ago
Read 2 more answers
Other questions:
  • What is 825x92. (just practice for 25 points)
    12·2 answers
  • Does anyone know the answer to this?​
    12·1 answer
  • Need help with easy/quick probability problems. Do 1-6 and explain how to do one of them
    13·1 answer
  • What is the square root of -1?
    14·1 answer
  • Kristin's grandparents started a savings account for her when she was born. They invested $500 in an account that pays 8% intere
    15·1 answer
  • I posted this earlier but i never got a<br> response. please help!
    7·1 answer
  • How many real and complex roots exists for a polynomial?
    10·1 answer
  • Find the volume of the pyramid 6cm 11cm 4cm
    11·1 answer
  • The point P(5, −1) is rotated 90 degrees clockwise around the origin.
    15·2 answers
  • You buy 100 file folders for 7.72. How much are you paying for each file folder?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!