1 year ago

How do you know if two line segments are perpendicular?

Mathematics

1 answer:

Otrada [13]1 year ago

3 0

If two line segments intersect at 90 degrees, then two line segments are perpendicular.

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1. sin(x+20) = cos(2x+10) 2. sin (2x+14) = cos(x-5)

lakkis [162]

Answer:

x=20°

x=27°

Step-by-step explanation:

sin(x+20)=cos (2x+10)

=sin (90-(2x+10))

so x+20=90-(2x+10)

x+20+2x+10=90

3x=90-30

3x=60

x=60/3=20

2x+14+x-5=90

3x+9=90

3x=90-9=81

x=81/3=27

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2 years ago

What is the percent of decrease of 90 to 72

vodomira [7]

You lose 20%.

if it were going up to 72 to 90 it would be a 25% increase

4 0

2 years ago

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Karen karlin bought some large frames for $15 each and some small frames for $8 each at a closeout sale. if she bought 22 frames

BaLLatris [955]

small frames ($8): s

large frames ($15): L

Cost: 8s + 15L = 239 ⇒ 1(8s + 15L = 239) ⇒ 8s + 15L = 239

Quantity: s + L = 22 ⇒ -8( s + L = 22) ⇒ -8s -8 L = -176

7L = 63

L = 9

Quantity: s + L = 22 ⇒ s + (9) = 22 ⇒ s = 13

Answer: 13 small frames, 9 Large frames

7 0

3 years ago

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Which expression has a value of 507 O A. 2x52 B. 2 x 55 C. 5 x 52 D. 5x25

d1i1m1o1n [39]

Answer:

.............,...........,.......................... ans is b

7 0

2 years ago

Please help! Will give brainliest! Trig ratio!

DiKsa [7]

Good question!

First of all, you need to be aware of the following trigonometrical ratios\functions:

For angle A:

adjacent=12
opposite=35
hypotenuse=37

Hence:
$cos(A)= \frac{12}{37} 
\\~\\
sin(A)= \frac{35}{37} 
\\~\\
tan(A)= \frac{35}{12}$

I hope that helps!

I am with you if you faced any difficulties!

4 0

2 years ago