Answer:
21
Step-by-step explanation:
7×3=21
You can also list out the multiples of 7 and 3, but its easier to just multiply
It can't, in triangle sum of 2 sides have to be more than 3rd side, and we know that

isn't more than

I also add picture to make it more clear, circles represents range of each side
Well, let's say the numbers are "a" and "b"
so a * b = ab
ok... now, if we reduce "a" by 25%, that means the new size is just 75% of the old one, how much is 75% of a? well, (75/100) * a, or 0.75a
now let's reduce "b" by 50%, that means the new size is 50% or half, how much is 50% of b? well (50/100)*b, or 0.5b

now, the new size of "ab" is just 0.375ab... well, let's revert the decimal format by simply multiplying by 100
0.375 * 100, is 37.5%
the new size of "ab" is just 37.5% of the original "ab"
it decreased by 100 - 37.5 or 62.5%
Answer:
1st,2nd, and 4th
Step-by-step explanation:
1)
2x + 14 = 28➡ x = 7
2)
60 = 4x + 32 ➡ x = 7
3)
2x - 6 -12 = -2x - 20 ➡ 4x = -2x = -1/2
4)
3x - 15 = 1 + 5x - 30 ➡14 = 2x ➡ x = 7
A.) y=5/4x+16
B.) 1.25 hours less each day