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ANTONII [103]
3 years ago
14

Please answer the questions before 12 am

Mathematics
1 answer:
marta [7]3 years ago
7 0

Answer:

8. 4m+2

9. 11m+4

10. 15u or 13u+2u

You might be interested in
C) The ratio between an exterior angle and an interior angle of a polygon is 1:5.
Bingel [31]

Answer:

30° and 12

Step-by-step explanation:

The sum of the exterior angle and the interior angle = 180°

sum the parts of the ratio, 1 + 5 = 6 parts

Divide 180° by 6 to find the value of one part of the ratio

180° ÷ 6 = 30° ← value of 1 part of the ratio

(i)

The exterior angle = 30°

(ii)

The sum of the exterior angles of a polygon is 360°

To find the number of sides n divide 360 by 30 , that is

n = 360 ÷ 30 = 12

5 0
3 years ago
Peter walked 10m from X to Y on bearing 020° and then he turned and walked 20m to Z with bearing 140° of Z from Y. Find the dist
seraphim [82]

Answer:

17.32m ; 110°

Step-by-step explanation:

Distance between X and Z

To calculate the distance between X and Z

y^2 = x^2 + z^2 - (2xz)*cosY

x = 20, Z = 10

y^2 = 20^2 + 10^2 - (2*20*10)* cos60°

y^2 = 400 + 100 - (400)* 0.5

y^2 = 500 - 200

y^2 = 300

y = sqrt(300)

y = 17.32m

Bearing of Z from X:

Using cosine rule :

Cos X = (y^2 + z^2 - x^2) / 2yz

Cos X = (300 + 100 - 400) / (2 * 20 '*10)

Cos X = 0 / 400

Cos X = 0

X = cos^-1 (0)

X = 90°

Bearing of Z from X

= 20° + X

= 20° + 90°

= 110°

3 0
3 years ago
Someone please help me with this.
Vladimir [108]

Answer:y=17

Step-by-step explanation:

5 0
3 years ago
If there are 7 blue chips and 5 red chips in a bag, what is the probability of drawing a blue chip?
Kazeer [188]

Answer:

7/12

Step-by-step explanation:

7+5=12

12-5=7

7/12

6 0
3 years ago
Read 2 more answers
Help! Is it parallel, perpendicular, or neither? Thanks *ignore handwriting*
Digiron [165]
These lines are perpendicular!
y = x
y = -x–2
The slopes are reciprocals of each other, so they are perpendicular.
7 0
3 years ago
Read 2 more answers
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