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sergeinik [125]
3 years ago
15

How do you know two lines are perpendicular?

Mathematics
1 answer:
Anon25 [30]3 years ago
5 0

Answer:

i dont know bro just taking my points back

Step-by-step explanation:

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Rational number, integer -5 What is the fraction?
Pavlova-9 [17]

Answer:

<h2>The answer would be negative five over one or -5/1 </h2>

8 0
3 years ago
The edge of a cube was found to be 30 cm with a possible error in measurement of 0.5 cm. Use differentials to estimate the maxim
IgorLugansk [536]

Answer:

for the volume a cube

Possible error = 1350cm³

Relative error = 0.05

Percentage error = 5%

For the surface area of a cube

Possible error = 180cm²

Relative error = 0.0333

Percentage error = 3.33%

Step-by-step explanation:

A cube is a three dimensional solid object with six (6) faces, twelve (12) edges and eight(8) vertices.

The volume of a cube = x³

Where x= length of the edge of a cube

X = 30cm 0.5cm

Differentiate V with respect to x (V = Volume of a cube)

dV/dx= 3 x²

dV= 3 x² . dx

dV = 3 × 30² × (0.5)

dV= 2700(0.5)

= 1350cm³

Maximum possible error = 1350cm³

Relative error = possible error /Volume

= dV/V

Recall that V = x³

V= (30)³

A = 27000cm³

Substitute the values for and V into the formula for Relative error

Relative error = 1350/27000

Relative error = 0.05

% error = Relative error × 100

= 0.05× 100

= 5%

Surface Area of a cube = 6x²

A = 6x²

Differentiate A with respect to x

dA/dx = 12x

dA/dx = 12x . dx

= 12 × 30 (0.5)

= 180cm²

Maximum possible error = 180cm²

Relative error = possible error / surface area

= dA/A

Recall that A = 6x²

A = 6(30)²

A = 5400cm²

Substitute the values for and A into the formula for Relative error

Relative error = 180/5400

Relative error = 0.0333(4 decimal place)

% error = Relative error × 100

= 0.0333 × 100

= 3.33%

8 0
3 years ago
410−x/7 +70=120. please answer fast i will give brainliest
galben [10]
410 - x/7 +70 = 120
410+70-120=x/7
360=x/7
X =2520
4 0
3 years ago
Read 2 more answers
Melissa bought a sweater on sale for $24.95. This is $8.04 less than the price that Christine paid for the same sweater when is
Monica [59]

24.95 + 8.04 = 32.99

Christine paid $32.99

7 0
3 years ago
This is a tough one :/<br> If f(x) = -x + 7 and g(x) = radical of x– 3,<br> what is (f º g)(4)
Jlenok [28]

Answer:

6

Step-by-step explanation:

To solve, first plug in 4 as your x value for your g(x) equation.

g(4)=\sqrt{4-3} \\g(4)=\sqrt{1} \\g(4)=1

Next, plug in the value of g(4) into your f(x) equation for x.

f(1)=-1+7\\f(1)=6

6 0
3 years ago
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