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lukranit [14]
4 years ago
5

Can u solve both 20. and 22. Geometry

Mathematics
1 answer:
SCORPION-xisa [38]4 years ago
8 0

Hey there!!

(1) Both the angles sum up to be 180.

(2) Both the angles sum up to be 90

_________________

(1) 4x+5+8x-5=180

... 12x=180

... x= 180/12

... x = 15

________________

(2) 4z+3z+6=90

... 7z+6=90

... 7z=84

... z=84/7

... x=12

__________________

Hope it helps!


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Simplify the expression. Show your work. 22 + (3^2 – 4^2)
irga5000 [103]
<span>22 + (3^2 – 4^2)
= </span><span>22 + (9 – 16)
</span><span>= 22 -7
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6 0
3 years ago
Identify the lateral area and surface area of a regular triangular pyramid with base edge length 6 cm and slant height 13 cm.
Law Incorporation [45]

The lateral area is 117 square centimeters and the surface area is 292.72 square centimeters

<h3>How to determine the lateral area?</h3>

The given parameters are:

  • Base length (b) = 6
  • Slant height (l) = 13

The lateral area is calculated using:

Lateral = 0.5 * (Perimeter of base) * Slant height

This gives

Lateral = 0.5 * (3 * 6) * 13

Evaluate

Lateral = 117

Hence, the lateral area is 117 square centimeters

<h3>How to determine the surface area?</h3>

The surface area is calculated using:

Surface = l²√3

This gives

Surface = 13² * √3

Evaluate

Surface = 292.72

Hence, the surface area is 292.72 square centimeters

Read more about areas at:

brainly.com/question/24487155

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6 0
2 years ago
If AB,BC, and AC are 7 inches, 9 inches, and 10 inches, respectively, and XY is 9 inches, find XZ
Ket [755]

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d) 12.9 in

Step-by-step explanation:

3)

ΔABC ≅ ΔXYZ

AB/AC = XY/XZ

7/10 = 9/XZ

XZ = 10 *9/7  

XZ = 12.9

Answer:

d) 12.9 in

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3 years ago
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Alchen [17]

Answer:

The answer would be 5/6.

Step-by-step explanation:

4 0
3 years ago
How do you solve 18x+27=117
Nonamiya [84]

Answer:

x = 5

Step-by-step explanation:

18x = 117 - 27

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x = 90/18

x = 5

6 0
3 years ago
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