Answer:
Step-by-step explanation:
6) 3x + 4 < - 62 x = - 23 ⇒ 3(-23) + 4 < - 62
<u> - 4 - 4 </u> -69 + 4 < - 62
3x < -66 - 65 < - 62
<u>÷ 3 ÷3</u>
x < -22
7) x/-5 + 1 <u><</u> 7 x = -30 ⇒ -30/-5 + 1 <u><</u> 7
<u> - 1 -1</u> 6 + 1 <u><</u> 7
x/-5 <u><</u> 6 7 <u><</u> 7
<u> × -5 × -5</u>
x <u><</u> -30
8) x/3 - 2 <u>></u> -12 x = -30 ⇒ -30/3 - 2 <u>></u> -12
x/3 <u>></u> -10 -10 - 2 <u>></u> -12
<u>* 3 *3</u> -12 <u>></u> -12
x <u></u><u>></u> -30
9) -2x - 6 > -18 x = 5 ⇒ -2(5) - 6 > -18
<u> +6 +6</u> -10 - 6 > -18
-2x > -12 -16 > -18
<u>÷ -2 ÷ -2</u>
x > 6 ⇒ x < 6
*flip the inequality sign because the divisor is a negative number: This is to make the inequality true.
(5280 vodas) * (1/2.71828 moloko/voda) * (1/3.1416 pivo/moloko) ≈ 618 pivos
(because 5280 has 3 significant digits)
When we have a coat with a 20% discount we only pay the remaining 80%.
This 80% equals £220
The original price was 100%
First we find out the value of 1%:
220 / 80 = £2.75
Finally we want to know the total 100% so find multiply our 1% by 100
£2.75 * 100 = £275
So the original price was £275
