Question

12. 12. What is the perimeter of a lot that measures 46.8 meters (m) by 50 meters? (Draw a diagram of the lot, and label the dimensions.) Math

Answer 1

Solution 12 50m 9 b: 46.8m Perimeter is the sum of a length of all sides of lot griven PARODY So, Perimeter, p= 2(1+b) → P: 2(50+46-8) = 100 + 9 3.6 193.6 m 13.17 Let the number be a Now 2 (x + 2.5)- { according to question χ 2.5 Vlo xx5 = 2.5x2 5 -:x= 5 = 1 So, the required number is 1. 21 Let each biscuit calls for (2) cups of flour 12 x = 1 Ź cups 4. 12x=3 2 x = 1 8 80,18 biscuits will call for (18 x to cups of flour → 24 cups of flour.

22 Initial medical Insurance, Mq = $150 Increased medical Insurance, Me - $ 180 So, porcentage increase = (M, -M1 Exog% Mi 180 - 150 ) x 100% 150 20 30 x 100 % 20% 25 Bob's last year salary was, $54,000 57. raise means 54000/increase re.$ 2700 increment 5 loo X 54000 Now His new salary 54000 + 2700 $ 56,700

Answer 2

SOLUTION :

12.

_____________  __

|                         |   ^     

|    PLOT           |    |   46.8 m

|                         |    |  

|____________ | _ v

              

|<—————-> |

       50 m 

Perimeter 

= 2*50 + 2*46.8 

= 100 + 93.6

= 193.6 m (ANSWER)

17.

Let the number be x.

So,

x / 2.5 = 2/5 

=> x = 2/5 * 2.5 = 1 (ANSWER).

Check :  

1 / 2.5 = 2/5 (OK)

21.

12 biscuits need = 1 1/2 = 3/2 cups of flour.

So, 1 biscuit needs = (3/2) / 12 = 1/8 cups flour.

So, 18 biscuits will need = 1/8 * 18 = 9/4 = 2 and 1/4 cups of flour (ANSWER).

Check :

!8 is 1.5 times 12 . So flour needed  = 1.5 * 3/2 = 2.25 cups = 2 and 1/4 cups (OK)

22.

% increase = (180 - 150)/150 *100 = 20% (ANSWER).

Check :

20% of 150 = 20/100 * 150 = 30 

New cost = 150 + 30 = 180 (OK)

25.

Raise in salary = 54000 * 5% = 54000 * 5/100 = 2700 ($) (ANSWER).

New salary = 54000 + 2700 = 56700 ($) (ANSWER)