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babunello [35]
3 years ago
11

7x+2y=1 What is the slope of a line perpendicular to this line? What is the slope of a line parallel to this line?

Mathematics
1 answer:
lesya [120]3 years ago
6 0

Answer:

The slope of a line perpendicular to this line would be 2/7 and the slope of a line parallel to this line would be -7/2.

Step-by-step explanation:

In order to find these, we first need to solve the equation for y.

7x + 2y = 1

2y = -7x + 1

y = -7/2x + 1

Now we can see the original slope is -7/2 due to it being the coefficient of x. We know parallel lines have the same slope, so the parallel slope is simple -7/2.

We also know perpendicular slopes have opposite and reciprocal slopes. So we take the -7/2 and change the sign (giving us 7/2). Then we flip it to get 2/7.

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3 years ago
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3 0
3 years ago
If an object is dropped from a tower, then the velocity, V (in feet per second), of the object after t seconds can be obtained b
Amiraneli [1.4K]

Answer:

259.6 ft/sec

Step-by-step explanation:

it is a universal standard that acceleration due to gravity is 32ft/sec^2.

Now it can be verified by equation,

V(f) = V(i)+at (1st equation of motion derived by Newton's three laws of motion)

where,

V(f) is final velocity

V(i) is initial velocity

a is acceleration which is constant and have value 32ft/sec^2

t is time which is given as 7.8 seconds

In the given case, initial velocity that is V(i) will be 0ft/sec. Because, on dropping, object will start to move under the influence of gravity from zero speed.

So,

V(f) = 0 +(32) (7.8)

V(f) = 249.6 ft/sec

Now the condition is given that you have to add a constant 10 to the answer.

so, V(f) = 249.6 + 10

      V(f) = 259.6 ft/sec

5 0
4 years ago
Can sum1 help me w this plz
mel-nik [20]

Answer:  x = 1.28 or -1.28

5 0
3 years ago
Read 2 more answers
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