Answer:
1 9
6 -2
-12 10
4 3
9 -5
3 -8
-4 6
-4 -3
-1 2
2 7
-18 -15
6 -3
-7 -6
-2 21
-5 5
2 2
Step-by-step explanation:
Question 2 use 180 -115 and divide by 2
maybe
Answer:
C. 120°
Step-by-step explanation:
Let angle A be x, then angle C is 2x
The sum of the angles in ABC is
A + B+ C = 180
x+90 +2x = 180
3x +90 = 180
3x= 90
Divide by 3
x = 90/3
x = 30
Angle A = 30, Angle C = 2x = 60
AH = BH, so it is an isosceles triangle . That means A and ABH are equal
A = 30 , ABH = 30
The sum of the angles in ABH must equal 180
A + ABH + BHA = 180
30 + 30 + BHA = 180
60 + BHA = 180
BHA = 180-60
BHA = 120
Rewrite the given quadratic equation in standard form: Kx 2 + 2x - 1 = 0
Discriminant = 4 - 4(K)(-1) = 4 + 4K
For the equation to have two real solutions, the discriminant has to be positive. Hence we need to solve the inequality 4 + 4K > 0.
The solution set to the above inequality is given by: K > -1 for which the given equation has two real solutions.
Each T shirt costs $21.
Since Martha takes her niece and nephew to a concert, and she buys T-shirts and bumper stickers for them, and the bumper stickers cost $ 1 each, and Martha's niece wants 1 shirt and 4 bumper stickers, and her nephew wants 2 shirts but no bumper stickers, to determine, if Martha's total is $ 67, what is the cost of one shirt, the following calculation must be performed, posing linear equations:
- 1 bumper sticker = $ 1
- 1 T shirt + 4 bumper stickers + 2 T shirts = $ 67
- 1X + 4 x 1 + 2X = 67
- 3X = 67 - 4
- X = 63/3
- X = 21
Therefore, each T shirt costs $21.
Learn more about linear equations in brainly.com/question/11897796
