Answer:
a) 0
b) scalene and obtuse
Step-by-step explanation:
∠A = 20
∠B = 60
∠C = 180 - 20 - 60 = 100 (obtuse)
Since none of the angles are equal, no sides are equal either
So, it's a scalene triangle
Since one angle is obtuse, it's an obtuse triangle
Firstly, subtract 2 from all sides of this inequality: 
Next, divide by 2 on all sides of the inequality and <u>your answer will be 
</u>
1.
x - 2y = -19
5x + 2y = 1 /+
6x = -18 / 6
x = -3
-3 - 2y = -19
-2y = -16. / ÷(-2)
y = 8
2.
3x + 4y = 18
-2x + 4y = 8 / ×(-1)
3x + 4y = 18
2x - 4y = -8 /+
5x = 10 / ÷5
x = 2
3 × 2 + 4y = 18
6 + 4y = 18 / -6
4y = 12 / ÷4
y = 3
3.
2x + y = 3
-x + 3y = -12 / ×2
2x + y = 3
-2x + 6y = -24 /+
7y = -21 / ÷7
y = -3
2x - 3 = 3 / +3
2x = 6 / ÷2
x = 3
Hit me up in comments if anything is unclear.
The pattern they're looking for in the uppermost question is 0,2,6,14,30,62.
The second problem shows the Fibonacci sequence. Each number is the sum of the two numbers before it. So:
2,3,5,8,13,21,34
34 are the number of miles she'll run on Week 8.
The equation on the bottom right is M = 5p. The first two numbers in the function table are 25 and 50.
