Answer:
x = -2
Step-by-step explanation:
-4x + 3y = 23
y = -7x - 9 // *-3
-4x + 3y = 23
-3y = 21x -27
+++++++++++++++++++
-4x = 21x + 50
-50 = 25x
x = -2
Answer:
x = 5
Step-by-step explanation:
Given
x = 
( square both sides )
x² = 3x + 10 ( subtract 3x + 10 from both sides )
x² - 3x - 10 = 0 ← in standard form
(x - 5)(x + 2) = 0 ← in factored form
Equate each factor to zero and solve for x
x - 5 = 0 ⇒ x = 5
x + 2 = 0 ⇒ x = - 2
As a check
Substitute these values into the equation and if both sides are equal then they are solutions.
x = 5
right side = 
= 
= 5 = left side ← solution
x = - 2
right side = 
= 
= 2 ≠ - 2 ← not a solution
Thus x = 5 is the solution to the equation
Answer:
6.) angle 1 = 61 degrees. angle 2 = 61 degrees. . 7.) angle 1 = 44 degrees
angle 2 = 44 degrees
Step-by-step explanation:
main reason is that because of Alternate Interior angles theorem angle 1 = angle 2
for both questions 6 and 7.
Also the angles that form a straight line sum to 180 degrees
so 61 + 58 + 61 = 180
and for 7
90 = 46 + 44
2700 is the answer. You do 9 times 3 then add the 0s
Answer:
Step-by-step explanation:
Mean=sum of data/no of data
=161/7
=23
median
first of all arrange the data frome ascending to descending order
4,14,18,23,28,35,39
median=(N+1)/2(N=no of data)
=7+1/2
=8/2
=4 th term
therefore median = 23
