13. You do -3 to the second power time 4 first. That equals -36. Than you do 7 to the second power that equals 49. 49-36 is 13.
Answer:
B
Step-by-step explanation:
We can get two equations from the inequality:
We just need to simplify both equations to get our answers:
The two answers we get are:
Which is also B.
Answer:
x = 2 , y=1
Step-by-step explanation:
to solve the equation using elimination method we say
let
x+y=3
.................. equation 1
2x-y=3................ equation 2
add all the equation together inorder to get rid of y
we have
x + y = 3
+ 2x -y = 3
------------------------
3x = 6
divide both sides by 3
3x/3 = 6/3
x = 2
substitute for x = 2 in equation 1 to get the value of y
x+y=3
.................. equation 1
2 + y = 3
y = 3 -1
y =2
therefore the value of x and y is 2 & 1 respectively
Answer:
80.78°
Step-by-step explanation:
When the 30 cm long string will be bent in the form of a sector it's two sides will be radii of the sector and lower part be the arc. Length of the arc can be found as given below.
Length of the string = 30 cm
radius of sector (r)= 8.8 cm
Length of the arc (l) = 30 - 2*8.8 = 30 - 17.6 = 12.4 cm
Let the sector makes angle at the centre of the circle.
Formula for length of arc of a sector is given as:
Plugging the values of l and r in the above formula, we find:
Answer:
Y = (-3) *X - 10
solution for Y =0 ---> X = -10/3
Step-by-step explanation:
Two points:
(Y0 ; X0) = (-4 ; 2)
(Y1 ; X1) = (-2 ; -4)
There is only one line which pass for both of them, his general expresion is:
y = a*x + b --- (1)
Calculating "a": is the pending of the line.
Calculating "b":
Since every point who belongs to the line satisfied the (1) expresion, we can use it for the point (Y1 ; X1) :
<u>Final expresion</u>
Replacing in (1):
Solutions: