Write an algebraic expression to represent the following:
One-fourth of a number, p, increased by eight.

1. Forty-two less than a number z

2. The product of eleven and a number k

3. A number t increased by seventy

4. The quotient of forty-three and a number m

5. Sixty-four added to a number w

6. One-hundred decreased by a number j

7. The sum of a number g and nine

8. Seventeen fewer than a number h

9. One-fourth of a number v

1) z - 42

2) 11k

3) t + 70

4) 43/m

5) w + 64

6) j - 100

7) g + 9

8) h - 17

9) 0.25v

I believe all of these are correct.

1) z - 42

2) 11k

3) t + 70

4) 43/m

5) w + 64

6) j - 100

7) g + 9

8) h - 17

9) 0.25v

I believe all of these are correct.

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

The answer is in the image 

Salesperson will make 6% of 1800

=(6/100)*1800

=108

Salesperson will make $108 in $1800 sales

The solution is given in the image below

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.