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kramer
3 years ago
9

Need help with 4 questions

Mathematics
1 answer:
Galina-37 [17]3 years ago
3 0

Answer:

uh

Step-by-step explanation:

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Which property is shown by the rails of a railway track?
eimsori [14]

Context please, Idk what your asking.

3 0
4 years ago
Read 2 more answers
Mike has 2 mats that are in the shape of triangles. The scale factor of the two triangular mats is 7 / 9. What is the ratio of t
Arlecino [84]

Answer:

Ratio of perimeters = 7 : 9

Step-by-step explanation:

Each side of the smaller triangle is 7 by 9 times the length of the corresponding side of the large triangle.

\text{Now, Since each side of the triangle is scaled by a factor of }\frac{7}{9}\\\text{So, sum of the lengths of the three sides will also be scaled by a factor of }\frac{7}{9}

\text{Therefore, the ratio of the perimeters of the two triangles }\\\text{will be the same as the scale factor : }\frac{7}{9}

6 0
3 years ago
Read 2 more answers
If g(x) = 3 - 2x find g(-1)​
marissa [1.9K]

Answer:

5

Step-by-step explanation:

g(x) = 3 - 2x

Let x= -1

g(-1) = 3 - 2*-1

      = 3 - -2

     = 3+2

     = 5

3 0
4 years ago
Read 2 more answers
If sinxcos(pi/7)-sin(pi/7)cosx=-sqrt2/2 then x can equal?
Rom4ik [11]
I'm going for a range of 0 < x <2<span>π

This is R sin (x-a), although R is 1.

a = </span><span>π/7, so 

=> sin (x-(</span><span>π/7)) = -1/(sqrt(2))
=> x = 53</span>π/28, 39<span>π/28</span>
8 0
3 years ago
Read 2 more answers
If DE = 37 cm and EF = 16 cm, then what are the possible lengths for DF so that DE,EF, and DF can form a triangle? Explain your
Molodets [167]

Answer:

The length of DF must be between 21 and 53.

Step-by-step explanation:

In a triangle, the length of two sides added together must exceed the length of the 3rd side. So, since EF is the shortest of the two givens, we know that EF + DF must be greater than DE. So we can plug in these numbers to find the minimum.

EF + DF > DE

16 + DF > 37

DF > 21

Now, for the upper maximum, we know that the two given lengths must be greater than the length of DF. So again, we can solve for the maximum using the amounts.

DE + EF > DF

37 + 16 > DF

53 > DF

With these two in mind, we know that DF must be between 21 and 53

6 0
4 years ago
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