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4 years ago

How does one do this? I’ve tried and still can’t get it please help

Mathematics

1 answer:

professor190 [17]4 years ago

6 0

Answer:

Step-by-step explanation:

An angle bisector cuts an angle into two equal parts. So m∠ACE = m∠ECB.

m∠ACE = m∠ECB

2x − 15 = x + 5

x = 20

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The perimeter of a rectangle is 87 ft. The length is x ft and the width is 19 ft. What is the length of the rectangle, in feet?

nikklg [1K]

Perimeter is all sides added up.

So, we know the width is 19ft and the length is x feet. We also know that the perimeter is 87 feet.

What we can do is make an equation to solve for x.

2x + 2(19) = 87

First, multiply 2 and 19.

2 x 19 = 38

2x + 38 = 87

Next, subtract 38 from both sides to move 38.

2x = 87 - 38

2x = 49

Lastly, divide both sides by 2 to get the value of x.

x = 49/2

x = 24.5

Thus, the length of the rectangle is 24.5ft

We can plug it into our equation to check if its correct.

2(24.5) + 2(19) = 87

24.5 x 2 = 49

2 x 19 = 38

49 + 38 = 87

7 0

3 years ago

Parallel line geometry

Igoryamba

<h3>Answer: Angle 1 is 80 degrees</h3>

==========================================================

Explanation:

See the diagram below. I've extended one of the rays to form a full line. This is shown in red. The alternate interior angles 60 and x are congruent due to the parallel lines, so x = 60.

We can then find angle y

x+y+20 = 180 ... angles of a triangle add to 180

60+y+20 = 180

y+80 = 180

y = 180-80

y = 100

Use this to find z

y+z = 180

100+z = 180

z = 180-100

z = 80

Or you could use the remote interior angle theorem

x+20 = z

60+20 = z

80 = z

z = 80

5 0

3 years ago

REAL LIFE ISSUE!

ratelena [41]

Answer:

You are doing good I would say! Your average grade would be a B- Or just a normal B Somewhat around there.

Step-by-step explanation:

I hope this helps you and good luck! Bye!

8 0

3 years ago

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I need to know the slope of the line <br><br> Help

densk [106]

Answer:

-3

Step-by-step explanation:

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3 years ago

Find the sides, and the value of x and y.

Gelneren [198K]

Answer:

$\huge\boxed{x=15;\ y=4}$

Step-by-step explanation:

Proportion:

$\dfrac{x}{18}=\dfrac{5}{6}\qquad|\text{cross multiply}\\\\(x)(6)=(18)(5)\\\\6x=90\qquad|\text{divide both sides by 6}\\\\\huge\boxed{x=15}$

$\dfrac{y}{5}=\dfrac{12}{x}$

substitute x = 15:

$\dfrac{y}{5}=\dfrac{12:3}{15:3}\\\\\dfrac{y}{5}=\dfrac{4}{5}\qquad|\text{cross multiply}\\\\(y)(5)=(5)(4)\\\\5y=20\qquad|\text{divide both sides by 5}\\\\\huge\boxed{y=4}$

3 0

3 years ago