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
SIZIF [17.4K]
3 years ago
10

Solve the system of equations x^2 + y^2 = 1 and y=2x - 2/5

Mathematics
1 answer:
drek231 [11]3 years ago
8 0
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(
3
5
,
4
5
)
,
(
−
7
25
,
−
24
25
)
(
3
5
,
4
5
)
,
(
-
7
25
,
-
24
25
)
Equation Form:
x
=
3
5
,
y
=
4
5
x
=
3
5
,
y
=
4
5
x
=
−
7
25
,
y
=
−
24
25
You might be interested in
PLEASE HELP! WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER
Naddik [55]

Answer:

180

Step-by-step explanation:

for 40 to be equal to 80 in percentages, the number has to be duplicated

3 0
3 years ago
Read 2 more answers
Will give brainliest for *BEST* answer!
Nataliya [291]
Use substitution and substitute y into the other equation. One of the equations already gives you y in terms of x, so use that and substitute it into the other equation. y = 3x - 4

Plug into the other equation: -3y = -9x + 12 
-3(3x-4) = -9x + 12
-9x + 12 = -9x + 12
This is an identity. So that means that any value of x makes this equation true. So B.
8 0
3 years ago
One-Half the difference of a number and 15
slega [8]

Answer:

x - 15 ÷ 2

Step-by-step explanation:

Since it wants you to find the half of your answer after you find the difference, be sure to leave the two at the end of your equation. With that said, let's move into finding out what "the difference of a number and fifteen is". Whenever they tell you 'a number', it means they want you to put a variable, such as x, since you do not know the number and it could be any number. Now, the "difference" of something usually means...you guessed it, subtraction! Now that you've decoded your equation, you now know it means that x - 15 is the first part, and you can now put the one half right after it.

If this is confusing, I can explain further. :D

5 0
3 years ago
Read 2 more answers
(Y+9)x2=42 find the cross products
sveta [45]
2y+18=42
2y=24
y=12
Hope this helps!
8 0
3 years ago
The right triangle shown has angles X, Y, and Z and side lengths a, b, and
laiz [17]
So attached is a picture of the triangle you are talking about and listed under are the choices:

A.) Cos Z=b/c 
B.) Sin X=c/b 
C.) Tan X=b/a 
<span>D.) Tan Z=a/b
</span>
The answer would then be B. SinX = c/b.

Just remember SOH CAH TOA:

Sinθ=  Opposite         Cosθ =    Adjacent             Tanθ=   Opposite
         Hypotenuse                   Hypotenuse                        Adjacent

Using the triangle in the scenario, you just need to identify which side is which. 

Given m∠Z
Adjacent = b
Opposite = a
Hypotenuse = c

SinZ=  a         CosZ = b             TanZ= a 
            c                      c                        b

Given m∠X:

Adjacent = b
Opposite = a
Hypotenuse = c

SinX= <u> b </u>        CosX =<span><u> a </u></span>            TanX=<span><u> b </u></span>
            c                      c                        a

So the answer is B. 

Attached is a picture of how I assigned the sides depending on the angle used.

4 0
3 years ago
Other questions:
  • 1 2 3 4 5 6 7 and 8 PLEASE HELP
    13·1 answer
  • I promise a FAN AND A MEDAL!!!!!!
    5·1 answer
  • Which expression is equivalent to (39)*?<br>A. 39<br>B. 34 x<br>.C. 3k + g<br>D. 128*​
    8·1 answer
  • What is the value of x?
    8·2 answers
  • Cesar bought lunch at school. He had a sandwich and a drink that cost ​$12. His drink cost ​$3.50. Solve the equation 12=s+3.50
    5·1 answer
  • Evan can jog 1 1/3 miles in 1/4 hour. Part a find his average speed in miles per hour
    9·1 answer
  • Help please, I attached the question. Is it a!? <br> 
    9·2 answers
  • A construction crew has repaired 1.37 miles of a highway. The total length of the highway to be repaired is 7.9. How many miles
    13·1 answer
  • Mr. Coffman asked his students to write an example of a square root with a value greater than 11 but less than 11.5. Select the
    12·1 answer
  • What is the greatest possible integer solution of the inequality 3.7x&lt;12.3
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!