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2 years ago

Expanding triple brackets i will give brainliest!

Mathematics

1 answer:

swat322 years ago

7 0

Answer:

$x^{3} -13x^{} -12$

Step-by-step explanation:

(x+1) (x−4) (x+3)

= ((x+1)(x−4)) (x+3)

= ((x+1)(x−4)) (x)+((x+1)(x−4)) (3)

= $x^{3} -3x^{2} -4x^{} +3x^{2} -9x^{} -12$

= $x^{3} -13x^{} -12$

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What does x equal 3.2x = 64

enyata [817]

64/3.2 = 20
The answer is 20

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3 years ago

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Gianna's family took a road trip. Gianna slept through the last 44% of the trip. If Gianna fell asleep after they had travelled

Nitella [24]

Answer:

500 miles

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2 years ago

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3. Diego drew a scaled version of a Polygon P and labeled it Q.

bogdanovich [222]

Answer:

The scale factor used to go from P to Q is 1/4

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x -----> area of polygon Q

y -----> area of polygon P

$z^{2}=\frac{x}{y}$

we have

$y=72\ units^2$

Find the area of polygon Q

Divide the the area of polygon Q in two triangles and three squares

The area of the polygon Q is equal to the area of two triangles plus the area of three squares

see the attached figure N 2

Find the area of triangle 1

$A=(1/2)(1)(2)=1\ units^2$

Find the area of three squares (A2,A3 and A4)

$A=3(1)^2=3\ units^2$

Find the area of triangle 5

$A=(1/2)(1)(1)=0.5\ units^2$

The area of polygon Q is

$x=1+3+0.5=4.5\ units^2$

Find the scale factor

$z^{2}=\frac{x}{y}$

we have $y=72\ units^2$

$x=4.5\ units^2$

substitute and solve for z

$z^{2}=\frac{4.5}{72}$

$z^{2}=\frac{1}{16}$

square root both sides

$z=\frac{1}{4}$

therefore

The scale factor used to go from P to Q is 1/4

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3 years ago

What’s the Perimeter and the Area

Leno4ka [110]

Triangle Perimeter: Add up the sides of the triangle.

26 + 24 + 10 = 60

The triangles perimeter is 60.

Triangle Area: height * base divided by 2

10 * 24 = 240

240/2 = 120

The triangles area is 120.

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3 years ago

Perimeter of the figure?

vlabodo [156]

Answer:

32 cm

Step-by-step explanation:

As we could see if the image was a full rectangle with width is 7 cm and the length is 9 cm, the perimeter of it would be 32 cm.

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3 years ago