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s2008m [1.1K]
3 years ago
14

5. If John, travelling at a constant speed on a stretch of highway, covers 25 miles in 30

Mathematics
1 answer:
anzhelika [568]3 years ago
6 0

Answer:

150 miles

Step-by-step explanation:

We can split 3 hours into six sections of 30 minutes, then multiply those six sections by the 25 miles. 6 times 25 equals 150

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Step-by-step explanation:

Okay, so I think I know what the equations are, but I might have misinterpreted them because of the syntax- I think when you ask a question you can use the symbols tool to input it in a more clear way, otherwise you can use parentheses and such.

Problem 1:

(x²)/4 +y²= 1

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*substitute for y*

Now we have a one-variable equation we can solve-

x²/4 + (x+1)² = 1

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*combine like terms*

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now, you can use the quadratic equation to solve for x

a= 5/4

b= 2

c=0

the syntax on this will be rough, but I'll do my best...

x= (-b ± √(b²-4ac))/(2a)

x= (-2 ±√(2²-4*(5/4)*(0))/(2*(5/4))

x= (-2 ±√(4-0))/(2.5)

x= (-2±2)/2.5

x will have 2 answers because of ±

x= 0 or x= 1.6

now plug that back into one of the equations and solve.

y= 0+1 = 1

y= 1.6+1= 2.6

Hopefully this explanation was enough to help you solve problem 2.

Problem 2:

x² + y² -16y +39= 0

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Step-by-step explanation:

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Help x3<br><br> 4 1/4 + __________ = 7 1/2
yulyashka [42]

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4 1/4 + 3 1/4 = 7 1/2

Step-by-step explanation:

To make 1/4 to 1/2 You would need 1/4, because 2/4 make 1/2

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