Activity 1 Know My Equation? Wnte the equation of each of the following circles given the center and the radius. Center Radius Equation in Standard Form 1 2 (3,7) origin 9 units 11 units 3 (- & 3) 14 units 4 (-5, -8) 3v3 units 16V/units 5 (11,-7)

» The equation of the circle in standard form is written as:

» Where (h,k) is the center and r is the radius. Substitute each given to get its equation.

#1. Center: (3,7), Radius: 9 units

#2. Center: (0,0), Radius: 11 units

#3. Center: (-8,3), Radius: 14 units

#4. Center: (-5,-8), Radius: 3√3 units

#5. Center: (11,-7), Radius: 16√2 units

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For every 8 cars there are 7 trucks

Therefore,

Cars:Truck=8:7

Answer is B)8:7

The answer is in the image 

Speed=Distance/time

Here,

distance=15m

time=1sec

speed=15/1=15m/sec

Distance=Speed*time

time=15min=15*60sec=900sec

Distance travelled in 15 min=15*900=13,500m

=13500/1000 km=13.5Km

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

Let the father's age be x and son's be y

10 years before-

Father age=x-10

sons age=y-10

Given,

x-10=10(y-10)

x-10=10y-100

Given present age of father=40

therefore,

x=40

40-10=10y-100

10y-100=30

10y=130

y=130/10

y=13

Therefore present age of son=13years

The solution is given below

Cost of 6 gallons =$15

Cost of 1 gallon =15/6

                           =$2.5

Cost of 7 gallons=$2.5 * 7

                           =$17.5

The answer is in the image