Answer:
1) (2, 3)
2) (2, -5).
Step-by-step explanation:
2x – y = 1
2x +2y = 10 Subtract to eliminate the 2x:
2x - 2x - y - 2y = 1 - 10
-3y = -9
y = 3.
Plug this into the first equation:
2x - 3 = 1
2x = 4
x = 2.
2)
5x – y =15
x + y = -3 Adding to eliminate y:
5x + x - y + y = 15 + -3
6x = 12
x = 2
Plug this into the first equation:
5(2) - y = 15
-y = 15 - 10 = 5
y = -5.
Answer:
A -6 < x ≤ -3
Step-by-step explanation:
21 ≤ - 3(x - 4) < 30
Divide all parts by -3. Remember that flips the inequalities
21/-3 ≥ - 3/-3 (x - 4) > 30/-3
-7 ≥ (x - 4) > -10
Add 4 to all sides
-7+4 ≥ x - 4+4 > -10+4
-3 ≥ x > -6
Rearranging the order
-6 < x ≤ -3
(-1/8 c+16)-(3/8+3c)=
= -1/8c + 16 - 3/8 - 3c
= (-1/8 c - 3c) + (16 - 3/8)
= (1/8 c - 24/8 c) + (128/8 - 3/8)
= - 23/8 c + 125/8
Answer:
some examples are 2/4, 3/6, 4/8, 5/10, 6/12, 7/14 and so on.
Step-by-step explanation:
any fraction with the numerator (number on the top) half of the denominator (number on the bottom) would apply to this.
-7a^2 because 3a-3a=0, the second set of terms can be simplified as -7a^2