Answer:
1. 3, 12, 48, 192, 768 Ratio: x4
2. 8, 16, 32, 64, 128 Ratio: x2
3. 120, 60, 30, 15, 7.5 Ratio: ÷2
4. 5, 10, 20, 40, 80, 160 Ratio: x2
5. 1.3?, 4, 12, 36, 108, 324 Ratio: x3
Hope this helps!
I'm not sure about the first one on question 5 though.
1 3/5
Step-by-step explanation:
First, convert the mixed number into an inproper fraction. 1 4/7 becomes 28/7 (7 times 1, plus 4)
Then just multiply across. 28 times two is 56, 7 times 5 is 35. Now you have 56/35.
Simplify that/divide, the answer is 1.6.
To convert to a fraction, it would become 1 6/10, which becomes 1 3/5 (6 divided by 2 is 3, 10 divided by 2 is 5, 3/5).
Answer is 1 3/5. Good luck!
-4 square units
a = l × b
x2 - 3x - 28 = (x +4)(×)
x2 - 3x - 28 = x2 + 4x
-3x - 28 - 4x = 0
-7x - 28 = 0
-7x = 28
x = -4
