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3 years ago

2v²+5v-7=0 please help!!

Mathematics

1 answer:

vaieri [72.5K]3 years ago

3 0

$2v^2+5v-7=0\\
2v^2-2v+7v-7=0\\
2v(v-1)+7(v-1)=0\\
(2v+7)(v-1)=0\\
v=-\dfrac{7}{2} \vee v=1$

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Vesnalui [34]

Answer:

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Step-by-step explanation:

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3 years ago

Ben has $100 to go shopping. Does he have enough money to buy a $20 and a $72 pair of shoes if there is an 8.5% tax

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3 years ago

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Step-by-step explanation:

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3 years ago

At a large nursery, a border for a rectangular garden is being built. Designers want the border’s length to be twice as long as

sasho [114]

Let

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y--------> the border’s width

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x=5+y------> equation 1

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3 years ago

As a sales person Jonathan is paid 50 per week +3% of the total Amount he sells. This week he wants to earn at least 100. Write

steposvetlana [31]

Answer:

The Inequality with integer coefficient for the total sales is $5000+3x\geq 10000$

Hence Jonathan should make total sales of at least <u>1667</u> to earn at least 100.

Step-by-step explanation:

Given:

Amount paid per week = 50

Addition amount = 3% of Total sales.

Let the Total sales be 'x'.

∴ Additional amount = $\frac{3}{100}x$

Amount he wants to earn this week $\geq$ 100

We need to write the inequality with integer coefficient for the total sales and also to find the total sales.

Solution:

We cans say that;

Amount paid per week plus Additional amount should be greater than or equal to Amount he wants to earn this week.

framing in equation form we get;

$50+\frac{3}{100}x\geq 100$

Now we will make the denominator common using LCM we get;

$\frac{50\times100}{100}+\frac{3}{100}x\geq 100$

$\frac{5000}{100}+\frac{3}{100}x\geq 100$

$\frac{5000+3x}{100}\geq 100$

Multiplying both side by 100 we get;

$100 \times\frac{5000+3x}{100}\geq 100\times 100\\\\5000+3x\geq 10000$

Hence The Inequality with integer coefficient for the total sales is $5000+3x\geq 10000$

On solving the above equation we get;

Subtracting both side by 5000 we get;

$5000+3x-5000\geq 10000-5000\\\\3x\geq 5000$

Dividing both side by 3 we get;

$\frac{3x}{3}\geq \frac{5000}{3}\\\\x\geq 1666.67$

Hence Jonathan should make total sales of at least <u>1667</u> to earn at least 100.

5 0

3 years ago