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2 years ago

13

the perimeter of a geometric figure is the sum of its sides. if the perimeter of the following pentagon is 42 meters, find the l

ength of each side

2 answers:

GrogVix [38]2 years ago

7 0

Answer:

qwtgwrg qegqaergeasrgae

Step-by-step explanation:

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stellarik [79]2 years ago

6 0

Answer: 2.5 divided by 2 equals 1.25 so each side equals 1.25

Step-by-step explanation:

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Sam has traveled 33 miles and knows that 55% of his trip is complete.How many total miles is Sam's trip?

ahrayia [7]

60 miles in total.
to find percentages, you divide the part by the whole, so 33/60 = .55, which you then move the decimal over two places and read as a percentage

5 0

3 years ago

Write an equation of the line that passes through (4,-1) and is parallel to the line -3x +y= 7

Gala2k [10]

Answer:

y = 3x -13

Step-by-step explanation:

y = 3x + 7

-1 = 3(4) + b

-1 = 12 + b

-13 = b

y = 3x -13

4 0

2 years ago

Find the surface area of the figure.<br> 22 m<br> 12 m<br> 5 m

prohojiy [21]

Answer:

12 m

Step-by-step explanation:

3 0

2 years ago

At a certain time of the day, a tree that is x meters tall casts a shadow that is x-49 meters long. If the distance from the top

nikklg [1K]

The height of the tree is 60 meters.

Explanation:

Let the height of the tree be x. The tree casts a shadow of $x-49$ meters and the distance from the top of the tree to the end of the shadow is $x+1$ meters.

The sides of the triangle are attached in the image below:

Using pythagoras theorem,

$x^{2}+(x-49)^{2}=(x+1)^{2}$

Expanding, we get,

$2 x^{2}-98 x+2401=x^{2}+2 x+1$

$2 x^{2}-98 x+2400=x^{2}+2 x$

$2 x^{2}-100 x+2400=x^{2}$

$x^{2}-100 x+2400=0$

Solving the equation using the quadratic formula $x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$ , we get,

$x=\frac{-(-100)\pm\sqrt{(-100)^{2}-4 \cdot 1 \cdot 2400}}{2 \cdot 1}$

Simplifying, we have,

$x=\frac{100\pm\sqrt{10000-9600}}{2}$

$x=\frac{100\pm\sqrt{400}}{2}$

$x=\frac{100\pm{20}}{2}$

Thus,

$x=\frac{100+20}{2} \\x=\frac{120}{2} \\x=60$ and $x=\frac{100-20}{2} \\x=\frac{80}{2} \\x=40$

where the value $x=40$ is not possible because substituting the value $x=40$ in $x-49$ results in negative solution. Which is not possible.

Hence, the value of x is 60.

Thus, The height of the tree is 60 meters.

7 0

2 years ago

PLSSSSSS HELPPPP PLSSSSS

Leviafan [203]

Answer:

C. 200 minutes, $260

Step-by-step explanation:

The equations would look like this

Lynn = y = 1.10x + 40

Heather = y = 1.15x + 30

Now just plug in.

Lynn

260 = 1.10(200) + 40

260 = 220 + 40

260 = 260

Heather

260 = 1.15(200) + 30

260 = 230 + 30

260 = 260

Hope this helps ya! Keep smiling!

5 0

2 years ago

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