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2 years ago

Someone help please

Mathematics

1 answer:

Rzqust [24]2 years ago

7 0

Answer:

A=(b^2)h/2

Step-by-step explanation:

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Solve 3x2 = −12x − 15. x = −4 ± 2i x = −4 ± i x = −2 ± 2i x = −2 ± i

diamong [38]

ANSWER

$x = - 2 \pm i$

EXPLANATION

We use the method of completing the squares.

The equation is
$3 {x}^{2} = - 12x - 15$

We rewrite the above equation to obtain;

$3 {x}^{2} + 12x = - 15$

We divide through by 3 to obtain;

${x}^{2} + 4x = - 5$

We add half the coefficient of
$x$

to both sides of the equation to get,

${x}^{2} + 4x + {2}^{2} = - 5 + {2}^{2}$

The right hand side is now a perfect square.

${(x + 2)}^{2} = - 1$

We now take square root of both sides to get;

$x + 2 = \pm \sqrt{ - 1}$

We add -2 to both sides,

$x = - 2 \pm \sqrt{ - 1}$

We simplify to obtain,

$x = - 2 \pm i$

3 0

3 years ago

Michael is making a card for his dad's birthday. He's shaded a triangular section on the card where he wants to write his dad a

artcher [175]

Answer:

Option C (72)

Step-by-step explanation:

In the figure attached we can see a rectangle ABCD with length 12 cm and width 9 cm.

A triangle PEF with height BE and base EF.

Since side AE = 3 cm, so side EB = EC = 9 - 3 = 6cm

and EF = AD = 12 cm

Now we will find the area of of the parts of the card that are not shaded.

Area of parts that are not shaded = Area of rectangle - area of shaded triangle

= (12×9) -

= 108 -

Option c) 72 cm² is the area of non shaded part.

Hope this helps!! -Mina

7 0

2 years ago

Read 2 more answers

The volume of a cylinder is found by:

densk [106]

Answer:

D. multiplying the area of the base by the height

Calculate the area of the base (which is a circle) by using the equation πr². Then, multiply the area of the base by the height of the cylinder to find the volume.

3 0

3 years ago

Y=3x+4 y=36x+7 determine whether the graph of each pair of equations are parallel, pendicularbor neither

Len [333]

Parallel is the answer

6 0

3 years ago

Mason claims that he can cut a parallelogram into two right scalene triangle. Which diagram best supports his claim

kkurt [141]

Answer:

THE ANSWER IS OPTION B

Because it has angles and all of them are not the same measure

3 0

2 years ago