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In-s [12.5K]
3 years ago
5

The product of 7 and a nimber increased by 3 is equal to twice the number subtracted from 39

Mathematics
1 answer:
miss Akunina [59]3 years ago
7 0
Let the number is = x

So number increased by 3 is = x+3.

So product of 7 and (x+3) is = 7*(x+3).

Twice of number is = 2x

So we can write 

7(x+3) = 39 - 2x

7x + 21 = 39 - 2x

Now we can arrange the term as

7x + 2x = 39 - 21

9x = 18

x = 2.

SO the number is 2.
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A person borrowef Rs 16000 from a bank at 12.5% pet annum simple intrest and lent the whole amount to shopkeeper at the sam rate
r-ruslan [8.4K]

Answer:

The amount he gains in 2 years is Rs. 250

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The parameters of the amount borrowed from the bank are;

The amount borrowed, P = Rs. 16,000

The interest rate of the amount borrowed, R = 12.5%

The number of years, T = 2 years

The simple interest, I = (P × R × T)/100 =  (Rs. 16,000 × 12.5 × 2)/100 = Rs. 4,000

The total amount the person is to pay bank to the bank = P + I = Rs. 16,000 + Rs. 4,000 = Rs. 20,000

The parameters of the amount lent to the shopkeeper are;

The amount lent, P = Rs. 16,000

The compound interest rate of the amount lent, R = 12.5%

The number of years, T = 2 years

The amount he receives from the shopkeeper after 2 years, A = P·(1 + R/n)^(n × T) = Rs. 16,000 × (1 + 0.125/1)^(1 × 2) = Rs. 20,250

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8 0
2 years ago
C) Bhurashi can do 1/3 part of a work in 6 days.
Simora [160]

Answer:

<h2>i. 18 days</h2><h2>ii.\frac{1}{18} part of work</h2><h2>iii. \frac{1}{2} part of work</h2><h2 />

Step-by-step explanation:

i.

\frac{1}{3} part of work can be done in 6 days.

Days taken to complete the whole work:

= 6 * 3

= 18 days

ii. Whole work will be done in 18 days.

So, 1 day work = \frac{1}{18}

iii. Work done in 9 days :

\frac{1}{18}  \times 9

=  \frac{1}{2}

So, remaining work :

1 -  \frac{1}{2}

=  \frac{1 \times 2 - 1}{2}

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=  \frac{1}{2} part of work

Hope this helps...

Good luck on your assignment..

8 0
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