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2 years ago

Can a triangle be made with the sides 15, 15, 30?

2 answers:

4 0

I don’t believe you can. You have to take the two smaller sides (in this case 15) add them together and they’ll need to have a sun greater than 30.—> 15+15>30 which in this case it’s equal to do it’s not possible. Hope this helped

Assoli18 [71]2 years ago

3 0

Answer:

Step-by-step explanation:

15^2+15^2=450 not 900=3^2

Hope this helps! ;-)

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Kathy is fencing in her yard that has an area of 800 square feet. Her yard is in the shape of a rectangle where the length is 60

anygoal [31]

Answer:

The dimensions of the yard are W=20ft and L=40ft.

Step-by-step explanation:

Let be:

W: width of the yard.

L:length.

Now, we can write the equation of that relates length and width:

$L=5W-60$ (Equation #1)

The area of the yard can be expressed as (using equation #1 into #2):

$Area=W*L=W*(5W-60)$ (Equation #2)

Since the Area of the yard is $800 ft^2$ , then equation #2 turns into:

$800=W*(5W-60)$

Now, we rearrange this equation:

$800=W*(5W-60)//800=5W^2-60W//5W^2-60W-800=0$

We can divide the equation by 5 :

$W^2-12W-160=0$

We need to find the solution for this quadratic. Let's find the factors of 160 that multiplied yields -160 and added yields -12. Let's choose -20 and 8, since $(-20)*8=160$ and $-20+8=-12$ . The equation factorised looks like this:

$(W-20)(W+8)=0$

Therefore the possible solutions are W=20 and W=-8. We discard W=-8 since width must be a positive number. To find the length, we substitute the value of W in equation #1:

$5*20-60=40$

Therefore, the dimensions of the yard are W=20ft and L=40ft.

7 0

2 years ago

A class of 25 students took a spelling test. Two students scored 100 on each test, nine students scored 95 on each test, ten stu

lawyer [7]

The average score is 90.6

5 0

3 years ago

Read 2 more answers

What is the value of k?

Romashka-Z-Leto [24]

Answer:

k = 10

Step-by-step explanation:

The triangles angels added up must equal 180 degrees, and the top angle is 65 degrees by the 180 degree rule.

So 10k + 15 must equal the remaining 115

subtract 15 from each side and you get 10k = 100

divide each each by 10 and you get the answer of k = 10

3 0

3 years ago

Susan has 45 hats in her closet.Her friends borrowed some of the hats.Nicky borrowed 3hats.And Shelly borrowed 2 hats.If Susan d

Zina [86]

Answer:

How many closets?

Step-by-step explanation:

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3 years ago

240 seventh graders and two-thirds of the students participate in after-school activities How many students participate in after

LekaFEV [45]

Answer:

160

Step-by-step explanation:

is there 240 seventh graders in total? If so all you have to do is:

240 x 2/3

which equals 160 seventh graders.

8 0

3 years ago