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3 years ago

Subtract -4a^2-2ab+9b^2 from 7a^2-3ab+5b^2

1 answer:

7 0

${7a}^{2} - 3ab + {5b}^{2} - ( - {4a}^{2} - 2ab + {9b}^{2}) \\ = {7a}^{2} - 3ab + {5b}^{2} + {4a}^{2} + 2ab + - {9b}^{2}) \\ = {7a}^{2} + {4a}^{2} - 3ab + 2ab + {5b}^{2} - {9b}^{2}) \\ = {11a}^{2} - ab - {4b}^{2}$

Answer:

${11a}^{2} - ab - {4b}^{2}$

Hope you could understand.

If you have any query, feel free to ask

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10. Jan purchased 140 shares of stock in the ABC Company at a price of $18.75 per share. During the

andre [41]

$\bold{\huge{\orange{\underline{ Solution }}}}$

$\bold{\underline{ Given :- }}$

Jan purchased 140 shares of stock in ABC company at a price of $18.75 per share
During the next 3 days, the value of share declined by $1.00 , $1.75 and $1.50

$\bold{\underline{ To \: Find :- }}$

We have to find the value of a share of ABC stock at the end of 3 days

$\bold{\underline{ Let's \: Begin :- }}$

According to the question,

Cost of 1 share of ABC company = $18.75

Therefore, 

Cost of 140 shares purchased by Jan in the ABC company

$\sf{ = 140 × 18.75 }$

$\sf{ = 2625\: dollars }$

Now, 

For next 3 days, the value of share declined

$\sf{ = (1 + 1.75 + 1.50)dollars }$

$\sf{ = 4.25 \: dollars }$

Therefore, 

The value of shares after 3 days will be

$\bold{ = }{\bold{\frac{2625 - 4.25}{ 140}}}$

$\bold{ = }{\bold{\frac{ 2620.75}{ 140}}}$

$\bold{\red{ = 18.75\: dollars}}$

Hence, The value of share after 3 days will be $18.75 .

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2 years ago

Eleven students are competing in an art contest. In how

KatRina [158]

Hi there

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3 years ago

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Fofino [41]

Answer:

A is your answer.

Step-by-step explanation:

The quickest way to find this is to count the whole numbers between each point given in the answers and look for the answer that falls between 2 and 3 units.

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3 years ago