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3 years ago

Select all the correct answers.

Mathematics

1 answer:

krok68 [10]3 years ago

4 0

Answer:

(x-1)(x-1) and (x-3)(x+2)

Step-by-step explanation:

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Im very confused help me

SIZIF [17.4K]

Answer:

$8250

Step-by-step explanation:

In other words, a 15% discount for a item with original price of $55000 is equal to $8250 (Amount Saved). Note that to find the amount saved, just multiply it by the percentage and divide by 100.

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7 0

3 years ago

Read 2 more answers

Write an equation to find the number of hours it will take Lily to reach her goal.

andrey2020 [161]

Answer: 1 hour and 20 mins

Step-by-step explanation:

Lily has to walk 4 more miles to complete her goal and with the pace of 3m/h she will have to for 1 hour 20 mins, to complete her goal.

Distance to be covered= 4 miles Speed= 3 miles per hour

Time= Distance/Speed

Time= 4/3

Time= 1.33 hours

Time= 1 hour and 20 mins

4 0

2 years ago

The diameter of a circle is:

Ann [662]

Answer:

The distance from an edge of a circle to another edge

Step-by-step explanation:

5 0

3 years ago

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Marc saved 30% of his monthly salary each month. His monthly salary in December was $ 3650. In January, his salary increased by

DiKsa [7]

Marc saved $2,533 in January than in December.

Step by Step calculation.

Given the details below :

Salary In December =$3,650

In January, Increased by 12%

Marc saves 30% of $3,650 in December

New salary can then be calculated as :

= Initial salary * % increase / 100 + Initial salary

= 3,650 * 12 / 100 + 3,650

= 3,650 * 0.12 + 3,650

= 4,088

The difference will now be

= 4,088 - 3650

= $438

Since Marc saves in December 30% of $3,650

= 30% of $3,650

= $1,095

Saves in January

= 1,095 + 438

= $2,533

Learn more here : https://brainly.in/question/36065141

8 0

3 years ago

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Solve <img src="https://tex.z-dn.net/?f=-2x%5E2%20%2B3x%20-%209%20%3D%200" id="TexFormula1" title="-2x^2 +3x - 9 = 0" alt="-2x^2

MArishka [77]

Answer:

$x= \frac{3-3\sqrt{7}i }{4}$ and $x= \frac{3+3\sqrt{7}i }{4}$

Step-by-step explanation:

We have to solve the given equation - 2x² + 3x - 9 = 0

To solve the equation given above we have to factorize the left-hand side of the equation.

But it can not be factorized. So, use the Sridhar Achaya formula.

Therefore, $x= \frac{-3 + \sqrt{3^{2}-4 \times (-2) \times (-9) } }{2\times (-2)}$ and $x= \frac{-3 -\sqrt{3^{2}-4 \times (-2) \times (-9) } }{2\times (-2)}$

So, $x= \frac{3-3\sqrt{7}i }{4}$ and $x= \frac{3+3\sqrt{7}i }{4}$ {Where $i=\sqrt{-1}$ }

Therefore, the solutions are imaginary numbers. (Answer)

Note: The Sridhar Acharya Formula gives if ax² + bx + c = 0, then the roots of the equation are $x = \frac{-b + \sqrt{b^{2}-4ac } }{2a}$ and $x = \frac{-b - \sqrt{b^{2}-4ac } }{2a}$ .

3 0

4 years ago