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Tanzania [10]
3 years ago
12

If a number is doubled, and 16 is added to it, the resault is 40. what is the number

Mathematics
1 answer:
Sphinxa [80]3 years ago
8 0

Answer:

The number is 12

Step-by-step explanation:

Let x = number

2x+16 = 40

Subtract 16 from each side

2x+16-16 =40-16

2x = 24

Divide by 2

2x/2 =24/2

x = 12

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15. a)
frutty [35]

Answer:

The correct answer is - A)8% B) 3%

Step-by-step explanation:

A) Let assume:

the cost price of the goods - $y.

the selling price of the goods - $x.

Given: The retailer sold at 4% discount, or 0.96x (100% - 4% = 96%). Since the goods were sold to make 20% profit, therefore it was sold for:

1.2y (100% + 20% = 120%).

Solution:

The refrigerator was sold at 13% VAT at Rs. 10848:

then,

=> 1.2y + 13%(1.2y) = 10848

=> 1.2y + 0.156y = 10848

=> 1.356y = 10848

=> y = 8000

Thus, the cp is Rs 8000.

The selling price is:

=> 0.96x = 1.2y

=> 0.96x = 1.2(8000)

=> x = 10000

The sp is Rs. 10000

For a profit of 15%, that is 1.15(8000) = 9200, the discount is:

(1 - discount)10000 = 9200

1 - discount = 0.92

Discount = 1 - 0.92 = 0.08 or 8%

B) Let C & M as cost price & marked price of the scanner machine respectively.  

(1 + 20/100)*C = 41400

or (6/5)*C = 41400

or C = (5/6)*41400

= 34500 (Rs)

(1 - 10/100)*(1 + 15/100)*M = 41400

or (9/10)*(23/20)*M = 41400

or M = (10/9)*(20/23)*41400

= 40000 (Rs)

Let R% as the reduction in the percent in discount  

(1 - 10/100 + R/100)*(1 + 15/100)*M

= (1 + 20/100 + 4/100)*C

or (9/10 + R/100)*(23/20)*40000

= (31/25)*34500

or 9/10 + R/100

= (20/23)(31/25)*(345/400)

or R/100 = 0.93 - 0.9 = 0.03

or R = 3%

7 0
3 years ago
There are 13 teams of cheerleaders at a competition. The order of performance is determined at random. What is the probability t
PIT_PIT [208]

probability of you performing first is 1/13

after your team performs there are 12 teams left, so chance of the other team performing next is 1/12


chance of both happening = 1/13 * 1/12 = 1/156

3 0
3 years ago
8 ft<br> 10 ft<br> Find the exact volume of the cylinder.
telo118 [61]

Answer:

V = 2010.6193 ft3

Step-by-step explanation:

7 0
4 years ago
HELPPP
alina1380 [7]
Ok, So:

10x3=30-3=27

It Would Be 27
6 0
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Two numbers with a sum of one
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Answer:

.5 and .5, .75 and .25, ect

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