8x + 5 = 3x + 15

8x - 3x = 15 - 5 (put same kinds of number on one side and change the signs)

5x = 10 (simplify)

5x/5 = 10/5 (simplify)

x = 2 (answer)

hope this helps

8 0

3 years ago

A store sells 3 ears of corn for $1 they round prices to the nearest cent.Tell whether you would describe the relationship betwe

ziro4ka [17]

<span>A store sells 3 ears of corn for $1. They round prices to the nearest cent as shown below. Tell whether you would describe the relationship between cost and number of ears of corn as proportional relationship. Justify your answer. Ears of corn 1 2 3 4 Amt charged($) 0.33 0.67 1.</span>

7 0

2 years ago

(a) Find the common difference of an A.P. whose first term is 5 and the number of terms is 30 and sum 1455.

Alexxandr [17]

Sum = n/2[2a + (n - 1)d] where a = first term, n = number of terms and d = common difference

(a) 30/2(2 x 5 + (30 - 1) x d) = 1455
10 + 29d = 1455 / 15
29d = 97 - 10
d = 87 / 29 = 3

(b) 7/2(2 x 9 + (7 - 1)d) = 0
18 + 6d = 0
6d = -18
d = -3

4 0

3 years ago