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Mamont248 [21]
2 years ago
13

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.<br><br> x = −4 ± 2i<br> x = −4 ± i<br> x = −2 ± 2i<br> 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.

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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
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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
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