Answer:
I can only answer one of them
Step-by-step explanation:
“1. If the top ten nations were randomly selected to march, one after another, into the stadium at the closing ceremonies, in how many ways could the nations have marched in?”
they can March in 4 ways
1. Straight
2. Left
3. Right
4. Round
Answer:
28
Step-by-step explanation:
12+[(15-5)]+(9-3)]
PEMDAS
Parentheses first
12+[(10)]+(6)]
Then add
12+10+6
4a + 6b = 10
2a - 4b = 12...multiply by -2
----------------
4a + 6b = 10
-4a + 8b = - 24 (result of multiplying by -2)
------------------add
14b = - 14
b = -14/14
b = -1
2a - 4b = 12
2a - 4(-1) = 12
2a + 4 = 12
2a = 12 - 4
2a = 8
a = 8/2
a = 4
so 12a = 12(4) = 48 <==
x is the third side of the triangle, we have:
7 + 10 > x > 10 - 7
<=> 3 < x < 17
so the answer is C. III and IV only
Answer:
Answer is 50 meters
Step-by-step explanation:
Solution:
Height of the building (h)= 90 meters.
Time taken by the ball to reach the ground (t) = 3 seconds
According to the statement;
h = kt²
90=k(3)²
90=k(9)
90=9k
Divide both the sides by 9
k=10
h=kt²
Put the value time (t)=2 in the equation
h=10(2)²
h=10(4)
h=40 meters
Distance from the ground = 90 - 40
=50 meters.
Thus the correct option is 50 meters....
