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maria [59]
3 years ago
12

ASAP PLS! What is 2k^2+3k-13=k^2+15?

Mathematics
1 answer:
shepuryov [24]3 years ago
8 0

2k^2+3k-13=k^2+15

subtract k^2 -15 from each side

k^2 +3k -28=0

(k+7)(k-4)=0

k=-7  k=4

Answer: k= -7,4

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Lelechka [254]

Answer: 140

Step-by-step explanation: 25x20=500

32x20=640

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1 year ago
sarah worked out for 15 today. she plans to add 5 min per week. write qnd equation to represent how many minutes she will be wor
garik1379 [7]

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4 0
2 years ago
Z varies jointly with x, and y, and z=7 when x= 2, y= 2
fomenos

Answer:

56

Step-by-step explanation:

Complete question:

Z varies jointly with x and y , x=2 and y=2, z=7. Find z when x=4 and y=8 using joint variation . (I need the problem worked out step by step)

If z varies jointly with x, and y, this is expressed as;

z = kxy

If z=7 when x= 2, y= 2

7  = k(2)(2)

7 = 4k

k = 7/4

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z = kxy

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z = 7*8

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Hence the value of z is 56

7 0
3 years ago
Which point is an x interception of the quadratic function f(x)=(x-8)(x+9)
viva [34]

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\text{We have}\ f(x)=(x-8)(x+9)=(x-8)(x-(-9))\\\\\text{therefore your answer is:}\\\\(8,\ 0),\ (-9,\ 0)

6 0
3 years ago
Read 2 more answers
What is the value of x?<br> 2 units<br> 3 units<br> 5 units<br> 8 units
irinina [24]

Answer:B

Step-by-step explanation:

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