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tatiyna
3 years ago
6

HELPPPPP

Mathematics
2 answers:
mart [117]3 years ago
7 0

answer is the first one and the last 2

NNADVOKAT [17]3 years ago
6 0

Answer:

<h2>1, 3 and 4 are true statements.</h2>

Step-by-step explanation:

Notice that the given triangle has all three side different, that means it's an scalene triangle.

Additionally, the triangular inequality states that the sum of two sides of a triangle must be greater than the third side, that is

DE+EF>DF\\DE+DF>EF\\DF+EF>DE

So, the first choice is also correct.

Then, we use thes triangular inequalities to find the third true statement.

We know that DE=4 and EF=9

DE+EF>DF\\4+9>DF\\DF

Also,

DE+DF>EF\\4+DF>9\\DF>9-4\\DF>5

Therefore, 5, which means side DF must be between 5 and 13.

The third true statement is the third option.

You might be interested in
Help please<br><br> 3 + 3 + 2 x 2 x 1 = ?
kramer

3 + 3 + 2 x 2 x 1 = ?

3 + 3 = 6

2 x 2 = 4

6 + 4 = 10

10 x 1 = 10

Your answer is <u>10</u>

hope this helps!

3 0
3 years ago
Find the distance and midpoint of a segment with the following endpoints: (5,-1) and (-9,-1)
Likurg_2 [28]

Answer:

d = 14

(-2,-1)

General Formulas and Concepts:

  • Order of Operations: BPEMDAS
  • Distance Formula: d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}
  • Midpoint Formula: (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})

Step-by-step explanation:

<u>Step 1: Define</u>

(5, -1)

(-9, -1)

<u>Step 2: Find distance </u><em><u>d</u></em>

  1. Substitute:                    d = \sqrt{(-9-5)^2+(-1-(-1))^2}
  2. Simplify:                        d = \sqrt{(-9-5)^2+(-1+1)^2}
  3. Subtract/Add:               d = \sqrt{(-14)^2+(0)^2}
  4. Evaluate:                       d = \sqrt{196}
  5. Evaluate:                       d = \14

<u>Step 3: Find Midpoint</u>

  1. Substitute:                    (\frac{5-9}{2},\frac{-1-1}{2})
  2. Subtract:                       (\frac{-4}{2},\frac{-2}{2})
  3. Divide:                          (-2,-1)
7 0
3 years ago
Identify the period, midline, and amplitude of the following cosine function graph.
Kaylis [27]

Answer:HHGNHHGHHGHNHG

Step-by-step explanation:

4 0
2 years ago
Find the simple interest on $500 at six percent for one year
solmaris [256]

Answer: $30

Step-by-step explanation: The formula for simple interest is principal x rate x time.

Putting your numbers into the formula, it will look like this:

I = 500 x .06 x 1

I = 30 x 1

I = 30

The interest on $500 for one year is $30.

7 0
3 years ago
Complete #2 for me and show proof , will give brainliest to whose right .​
Stells [14]

Answer:

<u>X</u> <u>Y</u> <u>(</u><u>X,</u><u>Y)</u>

-4 14. (-4,14)

-3 12. (-3,12)

-2 10. (-2,10)

-1 8. (-1,8)

0 6 (0,6)

1 4. (1,4)

2 2. (2,2)

4 0
2 years ago
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