If a/4 = b/7, what is the value of a-b/b?

Mathematics

1 answer:

Vladimir [108]2 years ago

6 0

3 all you have to do is divide 7 by seven and get 1 and after subtract 4 by 1 and you get 3.

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Math question down below

kramer

X + 4/5 = 11
x = 11 - 4/5
x = 55/5 - 4/5
x = 51/5 or 10 1/5

or u can do it this way..
x + 4/5 = 11.....multiply everything by common denominator of 5
5x + 4 = 55
5x = 55 - 4
5x = 51
x = 51/5 or 10 1/5

7 0

3 years ago

A regular octagon with side length a cm can be made by cutting off

Ksivusya [100]

Answer:

one side = $\frac{a\sqrt{2}}{2}$

Step-by-step explanation:

if you draw an octagon on a piece of paper, you can draw a square around it, you should be able to see a diagram of this attached, ignore the 6.

Let's say TP = a

since it's a regular octagon, TP = HT

and using the Pythagoras Theorem, we know a² + b² = c² and thus:

√(AT² + HA²) = HT

and since AT = HA which we will call x, the equation becomes:

√(2x²) = HT = a

rearrange the equation to solve for x and you get:

2x² = a²

x² = $\frac{a^{2} }{2}$

x = $\frac{a}{\sqrt{2}}$

which, if you rationalise the denominator, you get:

x = $\frac{a\sqrt{2}}{2}$

5 0

3 years ago

If LN=54 and LM=31, find MN

kirza4 [7]

In this item, it is unfortunate that a figure, drawing, or illustration is not given. To be able to answer this, it is assumed that these segments are collinear. Points L, M, and N are collinear, and that L lies between MN.

The length of the whole segment MN is the sum of the length of the subsegments, LN and LM. This can be mathematically expressed,
LN + LM = MN

We are given with the lengths of the smalller segments and substituting the known values,
MN = 54 + 31
MN = 85

<em>ANSWER: MN = 85</em>

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3 years ago

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attashe74 [19]

Answer:

975

Step-by-step explanation:

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2 years ago

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