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3 years ago

10

Solve using the Quadratic Formula: 3x2 + 3x - 6 - 0 -2, 1 1, 2 -3, 9 -3, -9

1 answer:

AysviL [449]3 years ago

6 0

Assuming that the equation is 3x^2+3x-6=0, then use the quadratic equation, (-b+- sqrt(b^2-4ac))/2a, with ax^2+bx+c as the original equation. so here we get (-3+-sqrt(9+72))/6 = (-3+-sqrt(81))/6 = (-3+-9)/6, = (-1+-3)/2 = 1 or -2. Plug in original to check.

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Which of the following is the simplified expression of 2 square root of -16 + the square root of 225 in standard form, a plus b

LuckyWell [14K]

Answer:

<em>The standard form like $(a+bi)$ will be: $15+8i$ </em>

Step-by-step explanation:

Given expression is: $2\sqrt{-16}+\sqrt{225}$

First factoring out -16 as (-1×16) , we will get....

$2\sqrt{-1}*\sqrt{16}+\sqrt{225}$

Now, replacing $\sqrt{-1}$ as $i$ .......

$2i\sqrt{16}+\sqrt{225}$

Finally, simplifying the radicals in the above expression, we will get......

$2i*4+15\\ \\ =15+8i$

Thus, the standard form like $(a+bi)$ will be: $15+8i$

7 0

3 years ago

Read 2 more answers

Reduce the fractions<br> 12/5

Tresset [83]

If you reduce the fraction to a mixed number than it would be 2 2/5 but if you want to reduce it to a decimal it would be 2.4

7 0

3 years ago

Read 2 more answers

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

Read 2 more answers

Vaselesa [24]

Answer:

1.5/2

Step-by-step explanation:

slope formula = y2-y1/ x2 - x1

point one (2,0)

point 2 (0, 1.5)

you dont really need to subtract anything because the intercepts, so the slope is 1.5/2

(slope or m = 1.5 - 0 / 2 - 0 )

x intercept = value of x when y is 0

y intercept = value of y when x is 0

3 0

3 years ago

Solve x2-9x+14=0<br> Would appreciate if anyone could help

Soloha48 [4]

X2-9x+14=0
X2+-9x= -7x
-7x+14=0
0-14=-14
-7x=-14
-14/-7=2
x=2

6 0

2 years ago