Answer:
1 pair of boots and 6 sweaters
Step-by-step explanation:
70+20s = 135
-70 -70
20s = 135
divide 20 both sides
s = 6.75
She can buy 6 sweaters because she cannot buy half a sweater.
s - sweaters
I need brainliest please
Step-by-step explanation:
in fraction it comes 36/121
and in decimal.it comes 0.3
Answer:
The pebble will hit the ground 8.29 second after it is thrown.
Step-by-step explanation:
Given that,
The height of the pebble after t seconds is given by the equation
h= -16t²+24 t+900.
When the pebble hit the ground, the height of the pebble will be zero.
So putting h=0 in the given equation.
0 = -16t²+24 t+900
⇒-4(4t²-6t-225)=0
⇒4t²-6t-225=0
Applying quadratic formula
, here a=4, b= -6 and c= -225.

⇒ t = 8.29, -6.79
Since time can not negative.
∴t=8.29 seconds.
The pebble will hit the ground 8.29 second after it is thrown.
Answer
Q11 is 50,3
Q12, 23,19
Step-by-step explanation: