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3 years ago

-1 + 2x - x = x - 8 + (-x)

Mathematics

1 answer:

CaHeK987 [17]3 years ago

6 0

Answer:

x = -7

Step-by-step explanation:

-1 + x = -8

x = -7

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ZB= Round your answer to the nearest hundredth. А 9 ? С B 5

xxMikexx [17]

45 degrees
Right triangle = 180
90 degrees is given
180-90= 90
Then divide by 2
90/2= 45 degrees

4 0

3 years ago

I need help, i get like 4712, but its not an answer

ella [17]

So you will need to find the height, and we can do so by using the pythagorean theorem, which is $leg^2+leg^2=hypotenuse^2$ . Using this formula, we can make the equation $15^2+h^2=25^2$

Firstly, solve the exponents: $225+h^2=625$

Next, subtract 225 on both sides: $h^2=400$

Lastly, square root both sides, and your answer is h = 20.

Now that we got the height, we can solve for the volume, which is $V=\pi r^2\frac{h}{3}$ . Using this formula, we can form our equation to be $V=\pi 15^2\frac{20}{3}$

Firstly, solve the exponent: $V=\pi*225*\frac{20}{3}$

Next, multiply 225 and 20/3, and your answer will be V = 1500π, or the third option.

7 0

3 years ago

Find the surface area of the hexagonal prism

arsen [322]

Answer:

$4,636.8 \: {in}^{2}$

Step-by-step explanation:

Surface area of the hexagonal prism

= Area of base * Height

= 6*Area of one triangle *height

$= 6( \frac{1}{2} \times 8 \times 6.9) \times 28 \\ \\ = 6(4 \times 6.9)28 \\ \\ = 6 \times 27.6 \times 28 \\ \\ = 4,636.8 \: {in}^{2}$

5 0

3 years ago

486 is 60% of what amount?

Alborosie

With these types of problem, just remember to replace "is" with "="
and remember 60% also = 0.6
and let's called the amount x
so
486 = 0.6x
divide both sides by 0.6
and you'll get x which is the amount you are looking for

7 0

3 years ago

What is the measure of an exterior angle in a regular triangle?

Alenkasestr [34]

Answer:

120 Degrees

Step-by-step explanation:

Considering all the angles will be 60 degrees, we know that the exterior angles must also be 120 degrees.

Simple as that.

5 0

3 years ago