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4 years ago

Please answer quick I’ll give 5 star

Mathematics

1 answer:

Lostsunrise [7]4 years ago

3 0

Answer:

(h,k) = (2, -3) a=4 ,b=5

Step-by-step explanation:

since the 1 is a standard equation for a right which is the left facing hyperbola with center h,k. the semi- axis A and semi is the conjuate = Axis B.

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What is 25= n+20 ?????will mark brainliest

Oksi-84 [34.3K]

Answer:

n=20-25

n=-5

Step-by-step explanation:

plz Mark my answer in brainlist

5 0

2 years ago

Read 2 more answers

Determine whether triangle XYZ is scalene, isosceles or equilateral.

dmitriy555 [2]

Answer:

scalene

Step-by-step explanation:

Length of XZ = √3² + 4² = √25 = 5

Length of ZY = √1² + 7² = √50 = 5√2

Length of XY = √4² + 5² = √41

As all lengths are different, the triangle is scalene

8 0

2 years ago

Please help fr , like i acc need help

xeze [42]

Step-by-step explanation:

first a little help, how they got the equations :

in total they need 15 liters.

so, whatever x and y are, but together they must be 15 L.

x + y = 15

then, we are mixing x liters of 20% alcohol with y liters of 100% alcohol, that have to result in a 40% solution of (x+y) liters :

0.2x + y = 0.4(x+y)

we know from the first equation that x+y = 15, so the second equation is actually

0.2x + y = 0.4 × 15 = 6

so, we have

x + y = 15

0.2x + y = 6

do you notice something ? there is a "+ y" in both equations.

so we can actually subtract the second equation from the first, eliminate y and solve for the remaining x. and then use one of the original equating to get also y :

x + y = 15

- 0.2x + y = 6

---------------------

0.8x 0 = 9

0.8x = 9

x = 9/0.8 = 11.25 liters

x + y = 15

11.25 + y = 15

y = 15 - 11.25 = 3.75 liters

8 0

2 years ago

PLEASE HELP I DO NOT UNDERSTAND AT ALL AND SHOW YOUR WORK !!