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2 years ago

Can someone please help me with this expanding brackets problem ? Quick ! I will give 20 points :)

Mathematics

1 answer:

eimsori [14]2 years ago

7 0

Step-by-step explanation:

$(x + 1)(x - 6)(x + 7)$

${x}^{2} - 6x + x - 6(x + 7)$

${x}^{3} + 7x - 6 {x}^{2} - 42x + {x}^{2} + 7x - 42$

${x}^{3} - 5x {}^{2} - 35x - 42$

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2 years ago

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3 years ago

Read 2 more answers

I will mark you brainliest!

s344n2d4d5 [400]

Answer:

Rate = 10%

Step-by-step explanation:

We are given with the following details.

Interest earned = $ 116.25

Principal = $ 1550

Interest Rate = r (say)

Time = 9 months

= $\frac{9}{12} years$

We are asked to determine the rate of interest for which we can earn 116.25 interest. As we are not specifically given whether it is a compound or simple interest , we assume it to be simple interest and solve .

The formula for simple interest is given as

$Interest = Principal \times Rate \times time$

$116.25=1550 \times r \times \frac{9}{12}$

$r= \frac{116.25 \times 12}{1550 \times 9}$

r=0.1

Hence the r = 0.1

Hence the rate of interest is 10%

3 0

3 years ago