Answer:
10
Step-by-step explanation:
(2/3) x (15)
is the same as
(2/3) x (15/1)
which means after you multiply them you get:
30/3
which simplifies to:
10
Answer:
1
Step-by-step explanation:
f(x) = a(2) + 6 = 2a + 6
Given f(2) = 8
so 2a + 6 = 8
2a = 8 - 6 = 2
so a = 1
Answer: 0.56
Step-by-step explanation: https://www.google.com/search?ei=jiluXP--Ec-1ggeSjovYCQ&q=radius+of+a+circle+formula&oq=radius+of+a+circle&gs_l=psy-ab.1.2.0i67j0i7i30j0i67j0i7i30l3j0i67j0i7i30j0i67j0i7i30.5785.5785..8095...0.0..0.94.94.1......0....1..gws-wiz.......0i71.PRpTHswP3sg&safe=active&ssui=on
this link is of a radius calc on google, i found it last year have used it ever since, it also gives you the formula so you can do it on your own
Answer:
![\sqrt{85}](https://tex.z-dn.net/?f=%5Csqrt%7B85%7D)
Step-by-step explanation:
To calculate the distance (d) use the distance formula
d = √ (x₂ - x₁ )² + ( y₂ - y₁ )²
with (x₁, y₁ ) = (- 1, 4) and (x₂, y₂ ) = (6, - 2)
d = ![\sqrt{(6+1)^2+(-2-4)^2}](https://tex.z-dn.net/?f=%5Csqrt%7B%286%2B1%29%5E2%2B%28-2-4%29%5E2%7D)
= ![\sqrt{7^2+(-6)^2}](https://tex.z-dn.net/?f=%5Csqrt%7B7%5E2%2B%28-6%29%5E2%7D)
=
=
← exact distance
Answer:
1.5secs
Step-by-step explanation:
Given the expression that models the height as;
h(t) = -16t²+20t +6
The ball will touch the ground at when h(t) = 0
0 = -16t²+20t +6
Swap
-16t²+20t +6 = 0
Divide through by -2
8t²-10t-3 = 0
Expand using the general formula
t = -(-10)±√(-10)²-4(8)(-3)/2(8)
t = 10±√100+96/16
t = 10±√196/16
t = 10±14/16
t = 10+14/16
t = 24/16
t = 1.5
Hence it will take the ball 1.5secs to hit the ground