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Stells [14]
2 years ago
14

Find the measure of each angle indicated.

Mathematics
1 answer:
Ivanshal [37]2 years ago
8 0

Answer:

3) B) 90°

4) A) 75°

Step-by-step explanation:

3) interior angles of a triangle =180°

So

40+50+?=180

? =180- 90

? =90

4) same rule

40+65+?=180

? =180 - 105

? = 75

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1

Step-by-step explanation:

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A recommendation for wheelchair ramps is that the rise-to-run ratio be no greater than 1:12. This ensures that the ramps are nav
patriot [66]

Answer:

a. 12 feet b. 12 feet 0.5 inches c. 8.33 %

Step-by-step explanation:

a. How far out horizontally on the ground will it protrude from the building?

Since the rise to run ratio is 1:12 and the building is 12 inches off the ground, let x be the horizontal distance the ramp protrudes.

So, by ratios rise/run = 1/12 = 12/x

1/12 = 12/x

x = 12 × 12

x = 144 inches

Since 12 inches = 1 foot, 144 inches = 144 × 1 inch = 144 × 1 foot/12 inches = 12 feet

b. How long should the ramp be?

The length of the ramp, L is gotten from Pythagoras' theorem since the ramp is a right-angled triangle with sides 12 inches and 144 inches respectively.

So, L = √(12² + 144²)

= √[12² + (12² × 12²)]

= 12√(1 + 144)

= 12√145

= 12 × 12.042

= 144.5 inches

Since 12 inches = 1 foot, 144.5 inches = 144 × 1 inch + 0.5 inches = 144 × 1 foot/12 inches + 0.5 inches = 12 feet 0.5 inches

c. What percent grade is the ramp?

The percentage grade of the ramp = rise/run × 100 %

= 12 inches/144 inches × 100 %

= 1/12 × 100 %

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6 0
2 years ago
Event tickets cost $20 each. A student ordered some tickets online. There was a service charge of $2.50 per ticket. The total co
antiseptic1488 [7]
(20+2.5)x = cost 

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8 0
3 years ago
Tina is 4 times older than Hanna. The sum of their ages is 40. How old is Hanna?
Ksenya-84 [330]

Answer:

<u>Hanna is 8 years old.</u>

Step-by-step explanation:

Hanna = x

Tina = 4x

Sum = 40.

Hanna =?

Hanna + Tina = 40

4x + x = 40

5x = 40

x = 40/5

x = <u>8</u>.

Hanna is <u>8 years</u> old.

5 0
2 years ago
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