Question

Please help me with these questions.
I have test
And explain the answers for it detailly​

Answer 1

Which class???

Which subject????

Answer 2

Answer:

7d - 18q + 5d = -12

5v + 9i - 7k + 8 = -16

84g ÷ 24n = 7

(5r x 6p) ÷ 10q = $10\frac{4}{5}$

-5w + 9x - 7y -8z + 12 - 4y = -221

Step-by-step explanation:

7d - 18q + 5d

= 12d - 18q

= 12 x 8 - 18 x 6 [putting the values d= 8 and q=6]

= 12(8 - 9)

=-12

5v + 9i - 7k + 8

= 5 x 7 + 9(-5) - 7x2 +8 [putting the values v=7, i=-5, k=2]

= 35 - 45 - 14 +8

= -16

84g ÷ 24n

= 84 x 8 ÷ 24 x 4 [putting the values g = 8 and n = 4]

= $\frac{(7.12.4.2)}{(2.12.4)}$

= 7

(5r x 6p) ÷ 10q

= (5 x 9 x 6 x 4) ÷ (10 x 10) [putting the values r = 9, p = 4 and q = 10]

= $\frac{5.9.6.4}{5.2.5.2}$

=$\frac{54}{5}$

=$10\frac{4}{5}$

-5w + 9x - 7y -8z + 12 - 4y

= 5w + 9x - 11y - 8z + 12

= 5(-7) + 9(-8) -11x2 -8x13 + 12 [putting the values]

= -35 - 72 - 22 - 104 + 12

= -221