Giving brainlest (NO SCALPERS)

d=1

Step-by-step explanation:

1. multiply both sides by 10: 5(7d+4)=70-15d

2. expand the left side: 35d + 20 = 70 - 15d

3. subtract 20 from both sides: 35d = 70 - 20 - 15d --> 35d = 50 - 15d

4. add 15 to both sides: 50d = 50

5. simplify: d = 1

0.5(7d+4)=7-1.5d <Your question.

1st step is to simplify both sides of the equation. 0.5(7d+4)=7-1.5d(0.5)(7d)+(0.5)(4)=7+ -1.5d. Now we distribute it. 3.5d+2=7+ -1.5d+7. Next step is to add 1.5d to both sides. 3.5d+2+1.5d= -1.5d+7+1.5d5d+2=7. The third step is to subtract 2 from both sides. So 5d+2-2=7-25d=5. Now the final step is to divide both sides by 5.5d5=55d=1.

Your Answer is d=1 :)

16

step-by-step explanation:

answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.