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3 years ago

Multiply. (x - 7)(x - 10) A) 2x + 70 B) x2 + 70 C) x2 - 70 D) x2 - 17x + 70

1 answer:

3 0

The answer is D. The easiest way to see this is by using the FOIL method.
First
Outside
Inside
Last. So the first is x2, the outside is -10x, the inside is -7x, and the last is 70. So it would be x2-17x+70

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A park has 22 elm trees. Elm leaf beetles have been attacking the trees. After removing several of the diseased trees, there are

serg [7]

Answer: 9 elm trees were removed.

Step-by-step explanation:

Let x represent the number of elm trees removed.

The total number of elm trees in the park is 22. Elm leaf beetles have been attacking the trees. After removing several of the diseased trees, there are 13 healthy elm trees left. The equation to find the number of elm trees that were removed would be

x + 13 = 22

Subtracting 13 from the left hand side and the right hand side of the equation, it becomes

x + 13 - 13 = 22 - 13

x = 9

3 0

3 years ago

(sec 12A - 1)/(sec 6A -1) = tan 12A / tan 3A

Ganezh [65]

Can I use dis... do u know how to use dis?

5 0

2 years ago

Find the volume of the wedge-shaped region (Figure 1) contained in the cylinder x2+y2=81 and bounded above by the plane z=x and

Natali5045456 [20]

In cylindrical coordinates, the volume is given with

$\displaystyle\int_{\theta=-\pi/2}^{\theta=\pi/2}\int_{r=0}^{r=9}\int_{z=0}^{z=r\cos\theta}r\,\mathrm dz\,\mathrm dr\,\mathrm d\theta$
$=\displaystyle\int_{\theta=-\pi/2}^{\theta=\pi/2}\int_{r=0}^{r=9}r^2\cos\theta\,\mathrm dr\,\mathrm d\theta$
$=\displaystyle\left(\int_{\theta=-\pi/2}^{\theta=\pi/2}\cos\theta\,\mathrm d\theta\right)\left(\int_{r=0}^{r=9}r^2\,\mathrm dr\right)$
$=486$

7 0

3 years ago

Read 2 more answers

Can You Guys Please Help???

Bezzdna [24]

Answer:

Step-by-step explanation:

The answer is c.

Proportional means a relationship of y = a constant multiplied by x

In this case, the constant is 7.

i.e. y = 7x

So if

x is 3, y is 21

x is 5, y is 35

x is 7, y is 49

and so on...

And there you have it.

8 0

3 years ago

The vertex of the parabola below is at the point (1, 3), and the point (2, 6) is on the parabola. What is the equation of the pa

lbvjy [14]

Easily we can use formula y=(x-h)^2 +k

as equation of a parabola if vertex was (h,k):

Y=(x-1)^2 + 3

and maybe node (2,6) is incorrect for this vertex of a parabola!!!

3 0

3 years ago