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Tamiku [17]
3 years ago
5

State whether the equations provided are true or false and why

Mathematics
1 answer:
Aleksandr [31]3 years ago
3 0

Answer:

a) true

b) false

c) false

Step-by-step explanation:

remember: <u>if a negative exponent is in the numerator, move the expression to the denominator and make the exponent positive and if a negative exponent is in the denominator, move the expression to the numerator and make the exponent positive</u>

a explanation- 7a x 1/b^3 = 7a/b^3

b explanation- z^-5/12 = 1/12z^5

c explanation- 1/-7x^-1 = -7x

... please give brainliest if you can :)) ...

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I need urgent help!!
Alex787 [66]

Answer:

B

Step-by-step explanation:

x - 5/8 + 1/8 = 6/8 = -3/8 if u simplify

to simplify u need to see how many times it can be shrunk to do it

hope that helped

8 0
3 years ago
Read 2 more answers
I don't understand how you find the value of expressions. Ex..<br> 5•[7+7÷(6+1)]+4•12
Alexxandr [17]
= [7+7 <span>÷ 7] + 4.12
= [7+1] + 4.12
= 8 + 4.12
= 12.12

</span>
4 0
3 years ago
Read 2 more answers
EASY, answer this simple question :) *What kind of angles are 2 and 3?
IgorLugansk [536]

Answer:

∠2   =  ∠3 is a pair of  Vertical Angles.

Step-by-step explanation:

Whenever two lines intersect with each other, the angle formed between them is called Vertically Opposite Angle.

Here, line l intersects the traversal so,

the angle formed between them  ∠1 and ∠4 are vertically opposite.

So, ∠1 =  ∠4

Also, as ∠1 +  ∠3 =  ∠2  + ∠4 = 180°  (LINEAR PAIRS)

So,  ∠3   =  ∠2 are also vertical angles.

5 0
4 years ago
Calculate the second moment of area of a 4-in-diameter shaft about the x-x and yy axes, as shown.
Keith_Richards [23]
Second moment of area about an axis along any diameter in the plane of the cross section (i.e. x-x, y-y) is each equal to (1/4)pi r^4.
The second moment of area about the zz-axis (along the axis of the cylinder) is the sum of the two, namely (1/2)pi r^4.

The derivation is by integration of the following:
int int y^2 dA
over the area of the cross section, and can be found in any book on mechanics of materials.

6 0
3 years ago
When do you use trigonometric functions
Zolol [24]

Answer:

Trigonometric ratios are used to find unknown angles/sides of a right angle triangle

6 0
3 years ago
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