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trapecia [35]
4 years ago
7

5 points Two lines are represented by equations: 10x - 15y = 21 and y = kx + 5. What value of k will make lines perpendicular?​

Mathematics
1 answer:
Wewaii [24]4 years ago
4 0

Answer:

Step-by-step explanation:

10x - 15y = 21

15y = 10x - 21

y = ⅔x - 7/5

slope of line is ⅔

slope of any perpendicular to line is -3/2

y = kx + k

slope of line is k

k = -3/2

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Solve x − 2y = 3 for x
sammy [17]

Answer:

x=2y+3

Step-by-step explanation:

x − 2y = 3

x=2y+3

3 0
3 years ago
OMGGG PLZZZ HELP I'LL GIVR U A MEDAL N FAN U (the answer have to be RIGHT)
Anna35 [415]
The probability of not rolling a 2 is 5/6, since the probability of rolling a 2 is 1/6.
6 0
3 years ago
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If mike Kevin and Dustin all collect baseball cards and Dustin and Kevin has 81 altogether and Dustin and Mike have 96 altogethe
jek_recluse [69]

Answer:

Dustin has 42 cards.

Mike has 54 cards.

Kevin has 39 cards

Step-by-step explanation:

subtract (Dustin + Mike) – (Dustin + Kevin) or 96 – 81.

Think of it like....

Dustin + Mike – Dustin – Kevin

Dustin – Dustin + Mike – Kevin

Mike – Kevin

Since 96 – 81 = 15, Mike – Kevin = 15

Add (Kevin + Mike) + (Mike – Kevin) or 93 + 15.

Think of it like...

Kevin + Mike + Mike – Kevin

Kevin – Kevin + Mike + Mike

Mike + Mike

Since 93 + 15 = 108, Mike + Mike = 108. If you divide, Mike had 54 cards. That means that you can find Kevin’s cards by using 93 – 54 or 39. You can then find Dustin’s cards by using 81 – 39 = 42.

Check:

Dustin’s cards + Kevin’s cards = 42 + 39 = 81

Dustin’s cards + Mike’s cards = 42 + 54 = 96

Mike’s cards + Kevin’s cards = 54 + 39 = 93

5 0
3 years ago
Tammy's home cost her S184,000. She lives in an area with a lively real estate market, and her hormincreases in value by 3.5%
Ivenika [448]

Answer:

  • D. $103800

Step-by-step explanation:

<u>Initial value of house:</u>

  • $184000

<u>Yearly increase rate of value:</u>

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<u>Time </u>

  • 13 years

Since the increase is concerning the current price it would be exponential growth.

<u>The function would be:</u>

  • V(t) = 184000*(1 + 3.5/100)^t, where V is the value after t years

<u>For t= 13 we get:</u>

  • V(13) = 184000*(1.035)^13 = 287800

<u>Profit made would be:</u>

  • 287800 - 184000 = 103800

Correct option is D.

5 0
3 years ago
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I need help please.
Marat540 [252]

Answer:

7-x

This is because 7 itself is decreased by a number, if for e.g that number was 5, the expression would mean 7-5= 2

5 0
3 years ago
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