What is sec 180 degrees?

PLS HELP!!! FIRST ANSWER GETS BRAINLIEST!!!

olga55 [171]

Answer:C

Step-by-step explanation:11m is the radius and to find the diameter u multiply 11 x 2 which is radius x 2 which = 22

5 0

3 years ago

Solve the simultaneous equations 4x+3y=1 4x^2+3xy+y^2=2

Fantom [35]

Notice that the second equation,

4x ² + 3xy + y ² = 2

can be written as

x (4x + 3y) + y ² = 2

and the first equation says 4x + 3y = 1, so this reduces to

x + y ² = 2

Solve the first equation for x :

4x + 3y = 1

4x = 1 - 3y

x = (1 - 3y)/4

Substitute this into the reduced second equation to get a quadratic equation in y, which happens to be easily factorized and solved:

(1 - 3y)/4 + y ² = 2

1 - 3y + 4y ² = 8

4y ² - 3y - 7 = 0

(4y - 7) (y + 1) = 0

4y - 7 = 0 or y + 1 = 0

y = 7/4 or y = -1

Solve for x :

x = (1 - 3 (7/4))/4 or x = (1 - 3 (-1))/4

x = -17/16 or x = 1

So the two solutions are (x, y) = (-17/16, 7/4) and (x, y) = (1, -1).

8 0

2 years ago

What is special about y coordinate that goes with the x coordinate of 1on a proportional gragh

Rom4ik [11]

Answer:

The first coordinate (usually the x-coordinate) is called the domain and the second (usually the y-coordinate) is called the range. If tou remember from earlier chapters the domain contains values that correspond to the independent variable whereas the range contains values corresponding to the dependent variable.

Step-by-step explanation:

I majored in Mathematics

4 0

3 years ago

What times what equals 30 but add to get 40?

musickatia [10]

Lets call those two unknown numbers a, b and write the info in the problem as equations:
a*b = 30
a + b = 40
lets solve for a in the second equation and substitute in the first:
a + b = 40
a = 40 - b
therefore:
a*b = 30
(40 - b)b = 30
40b - b^2 = 30
b^2 - 40b + 30 = 0
if we apply the general quadratic equation to solve we have:
b = (40 +- √(1600 - 120))/2
b = (40 +- √(1480))/2
b = (40 +- 38.47)/2
There are two solutions:
b1 = (40 + 38.47)/2
b1 = 39.24
b2 = (40 - 38.47)/2
b2 = 0.765
lets use the second solution b2 = 0.765, and substitute in the first equation to find a:
a*b = 30
a*0.765 = 30
a = 30/0.765
a = 39.216
so the numbers are 39.216 and 0.765

5 0

3 years ago

Read 2 more answers

Soooo.... when does shrek 5 come out

Komok [63]

Answer:2022

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers