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SIZIF [17.4K]
3 years ago
8

In attempting to solve the system of equations y = 3x - 2 and 6x - 2y = 4, John graphed the two equations on his graphing calcul

ator. Because he saw only one line, John wrote the answer to the system is the empty set. Is he correct? Explain your answer.
Mathematics
1 answer:
ExtremeBDS [4]3 years ago
8 0

Answer:

He is not correct, the answer is All Real Numbers.

Step-by-step explanation:

When two lines are right on top of each other, the solution set is All Real Numbers that are on both lines because the solution set is the point(s) at which the lines overlap.

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#4 need help with this one
4vir4ik [10]

Answer:

x = 25.6

Step-by-step explanation:

As we can see, this is a right triangle, so there are known relationships

well to start we have to know the relationship between angles, legs and the hypotenuse

α = 43

a: adjacent  = x

o: opposite

h: hypotenuse  = 35

sin α = o/h

cos α = a/h

tan α = o/a

we see that it has (angle, adjacent, hypotenuse)

cos α = a/h

cos 43° = x / 35

cos 43° * 35 = x

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if we want to round to the nearest tenth

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Bond [772]

Answer:

Oliver completed his training work in 50.25 hours

Step-by-step explanation:

we know that

1\ day= 24\ hours

1\ hour=60\ minutes

we have

2\ days, 2\ h,\ and\ 15\ min

<u><em>Convert days to hours</em></u>

2\ days=2(24)=48\ hours

<u><em>Convert minutes to hour</em></u>

15\ min=15(1/60)=1/4=0.25\ h

so

2\ days, 2\ h,\ and\ 15\ min=(48)+(2)+(0.25)=50.25\ h

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4 0
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1ft/12in=3.5ft/?in
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So,

15/390 = 5/130 = 1/26

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