Help asap please, forgot how to do math :)

Mathematics

2 answers:

kherson [118]2 years ago

5 0

Answer:

11.4

Step-by-step explanation:

Pythagorean theorem

$7^{2}$ + $9^{2}$ = $x^{2}$

49 + 81 = $x^{2}$

130 = $x^{2}$

11.4 = x

Sergio039 [100]2 years ago

3 0

Answer:

x = 8

Step-by-step explanation:

A common pythagorean triplet is 7, 8, 9

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ser-zykov [4K]

Answer:

x = 16

Step-by-step explanation:

The two marked angles are supplementary:

(7x -2) +(4x +6) = 180

11x +4 = 180

11x = 176

x = 176/11 = 16

The value of x is 16.

_____

<em>Additional comment</em>

The angle on the left is 110°; the one on the right is 70°, so that answer checks.

These marked angles are called "consecutive exterior" angles. Just as "consecutive interior" angles are supplementary, so are consecutive exterior angles.

Essentially, all of the obtuse angles are congruent, as are all of the acute angles. The obtuse angles are supplementary to the acute angles.

4 0

2 years ago

A map has a scale of 1:25 000.How many kilometres in actual distance is represented by the length 6.8cm on a map?solution

Ghella [55]

Answer:

$= 1.7km$

Step-by-step explanation:

$1 : 25000 \\ 1cm = > 25000cm \\ 6.8cm = > 25000 \times 6.8 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = > 170000cm \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = > 1700m \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = > 1.7km$