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3 years ago

I need help with this cause I'm terrible at Geometry, and I don't get a single thing

Mathematics

1 answer:

svetoff [14.1K]3 years ago

4 0

The answer to this very simple question is B:)

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Rectangle ABCD has a perimeter of 32 units and will be rotated about line k. What is the three-dimensional solid created?

murzikaleks [220]

Answer:

cylinder

Step-by-step explanation:

5 0

4 years ago

Read 2 more answers

Help math look at pic

Sloan [31]

Answer: $\Large\boxed{(-4,~-3)~\text{and}~(-2,~1)}$

Step-by-step explanation:

Given the system of equation

$1)~y=-(x+2)^2+1$

$2)~y=2x+5$

Expand the parenthesis of the 1) equation

$y=-(x+2)^2+1$

$y=-(x^2+4x+4)+1$

$y=-x^2-4x-4+1$

$y=-x^2-4x-3$

Current System

$1)~y=-x^2-4x-3$

$2)~y=2x+5$

Substitute the y value of the 1) equation with the 2) equation

$2x+5=-x^2-4x-3$

Add ( x² + 4x + 3) on both sides

$2x+5+(x^2+4x+3)=-x^2-4x-3+(x^2+4x+3)$

$2x+5+x^2+4x+3=0$

Combine like terms

$x^2+2x+4x+5+3=0$

$x^2+6x+8=0$

Factorize the quadratic equation

$(x+4)(x+2)=0$

$x=-4~\text{or}~x=-2$

Substitute the x values into one of the equations to find the y value

$y=2x+5$

$y=2(-4)+5=-8+5=-3$

$y=2(-2)+5=-4+5=1$

Therefore, the two solutions are:

$\Large\boxed{(-4,~-3)~\text{and}~(-2,~1)}$

Hope this helps!! :)

Please let me know if you have any questions

8 0

2 years ago

A computer store buys a computer system at a cost of $465.60. The selling price was first at $776, but then the store advertised

Diano4ka-milaya [45]

Answer: a: 543.2 b: 465.6

Step-by-step explanation:

a. find 30% of $776, which is 232.8. subtract 232.8 from 776.

b. find 40% of $776, which is 310.4. subtract 310.4 from 776

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3 years ago

Which pairs of fractions can be added using the given common denominators

Alex

Answer:

Step-by-step explanation:

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3 years ago

Greg is building a gazebo and wants to brace each corner by placing a 21-inch wooden bracket diagonally as shown. How far below

castortr0y [4]

Answer:

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Step-by-step explanation:

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3 years ago