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chubhunter [2.5K]
3 years ago
13

A line passes through (-1,-5) and is perpendicular to the graph of y = -2x + 5. What equation represents the line in

Mathematics
1 answer:
amid [387]3 years ago
8 0

y=(1/2)x -9/2

Step-by-step explanation:

m1.m2= -1 -2.m2= -1 m2 = 1/2

y+5=1/2(x+1)

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Cos s=-2/5 and sin t=4/5, s and t are in quadrant II<br> find cos(s+t) and cos(s-t)
mojhsa [17]

Answer:

•cos(s+t) = cos(s)cos(t) - sin(s)sin(t) = (-⅖).(-⅗) - (√21 /5).(⅘) = +6/25 - 4√21 /25 = (6-4√21)/25

•cos(s-t) = cos(s)cos(t) + sin(s)sin(t) = (-⅖).(-⅗) + (√21 /5).(⅘) = +6/25 + 4√21 /25 = (6+4√21)/25

cos(t) = ±√(1 - sin²(t)) → -√(1 - sin²(t)) = -√(1 - (⅘)²) = -⅗

sin(s) = ±√(1 - cos²(s)) → +√(1- cos²(s)) = +√(1 - (-⅖)²) = √21 /5

5 0
3 years ago
Which triangle is similar to ABC
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The triagle which is similar to ABC id DEF. The first option is correct since thwy have the same measurement of its sides
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The probability that any postcard posted in Portugal on Monday is delivered to the UK within a week is 0.62.
sashaice [31]

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You can expect at least 9 of her postcards to arrive within a week

To find that, we multiply the number of postcards by the probability

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Hope this helps

Good Luck

5 0
3 years ago
Multiply<br><br> 5( 4n -5)<br> tell me how
rewona [7]

Distribute

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Simplify 5 × 4n to 20n

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Step-by-step explanation:

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