Which expression has the sum of twenty six twentieths?

Mathematics

2 answers:

weeeeeb [17]3 years ago

7 0

The first one ://////)

aniked [119]3 years ago

7 0

Answer: A is the answer

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Find the measure in degrees and radians of the angle representing 7/12 of a circle

Shtirlitz [24]

$\bf \textit{a full circle has }360^o\textit{ and }2\pi \textit{ radians, thus }
\\\\\\
360\cdot \cfrac{7}{12}\implies \stackrel{degrees}{210^o}\qquad \qquad 2\pi \cdot \cfrac{7}{12}\implies \stackrel{radians}{\cfrac{7\pi }{6}}$

6 0

3 years ago

Every 100 tons of the earth's crust contain about 28 tons of silicon. What is the ratio of the weight of silicon to the weight o

d1i1m1o1n [39]

<h3>Answer:</h3>

28/100 = 7/25
100/28 = 25/7

<h3>Explanation:</h3>

The wording "the ratio of A to B" means A/B.

Here, "the ratio of the weight of silicon to the weight of crust" means ...

... (28 tons)/(100 tons)

Canceling common factors (and common units), this is ...

... 28/100 = 7/25

___

Then "the ratio of the weight of crust to the weight of silicon" means ...

... (100 tons)/(28 tons) = 100/28 = 25/7

4 0

3 years ago

Help please thank you

lara31 [8.8K]

One of the rules of logarithms is as follows;

$\begin{gathered} \log _ab=x \\ Is\text{ equivalent to,} \\ a^x=b \end{gathered}$

We can now insert the corresponding values in the question provided, as shown below;

$\begin{gathered} \log _2\frac{1}{16}=-4 \\ \text{This is equivalent to,} \\ 2^{-4}=\frac{1}{16} \end{gathered}$

Note that, one of the rules of exponents, states that a number when raised to the power of a negative value, is equivalent to the reciprocal of that expression. An example is shown below;