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1 year ago

100 points PLEASE ANSWER ASAP thank you so much

Mathematics

2 answers:

igomit [66]1 year ago

8 0

Answer:

$\large\text{$ x^{\frac{21}{25}} $}$

Step-by-step explanation:

Given expression:

$\large \text{$ \left(x^{\frac{3}{5}}\right)^{\frac{7}{5}} $}$

$\textsf{Apply exponent rule} \quad (a^b)^c=a^{bc}:$

$\implies \large \text{$ x^\left(\frac{3}{5} \times \frac{7}{5}\right) $}$

$\implies \large \text{$ x^{\frac{21}{25}} $}$

uysha [10]1 year ago

7 0

Answer:

X elevated to 21/25

Step-by-step explanation:

Exponent law say you have to multiplied the exponents:

(3/5)*(7/5) =

21/25

The mistake was using sumatory instead multiplication.

Regards

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A baker purchased 12 lb of wheat flour and 15 lb of rye flour for a total cost of $18.30. A second purchase at the same prices,

vivado [14]

12w+15r=18.30 /*2
15w+10r=16.75 /*3

24w+30r=36.60, subtract this equation from the other one
45w+30r=50.25

21w=13.65
w=13.65/21
w=0.65 is a cost per pound for wheat flour

From the first equation we have
r=(18.30-12w)/15
r=(18.30-12*0.65)/15
r=0.70 is a cost per pound for rye flour

3 0

2 years ago

Tan 3A in terms of tan

Zanzabum

Here's the sum rule for the tangent function:

$\tan(a+b)=\dfrac{\tan(a)+\tan(b)}{1-\tan(a)\tan(b)}$

In the special case a=b, this becomes the double angle formula:

$\tan(a+a)=\tan(2a)=\dfrac{\tan(a)+\tan(a)}{1-\tan(a)\tan(a)}=\dfrac{2\tan(a)}{1-\tan^2(a)}$

In your case, you case use the sum rule once:

$\tan(3a)=\tan(2a+a)=\dfrac{\tan(2a)+\tan(a)}{1-\tan(2a)\tan(a)}$

And use it again, in the special case of the double angle:

$\dfrac{\dfrac{2\tan(a)}{1-\tan^2(a)}+\tan(a)}{1-\dfrac{2\tan(a)}{1-\tan^2(a)}\tan(a)}$

We can obvisouly simplify this expression a lot: let's deal with the numerator and denominator separately: the numerator is

$\dfrac{2\tan(a)}{1-\tan^2(a)}+\tan(a) = \dfrac{2\tan(a)+\tan(a)-\tan^3(a)}{1-\tan^2(a)}$

and the denominator is

$1-\dfrac{2\tan(a)}{1-\tan^2(a)}\tan(a) = \dfrac{1-\tan^2(a)-2\tan^2(a)}{1-\tan^2(a)} = \dfrac{1-3\tan^2(a)}{1-\tan^2(a)}$

So, the fraction is

$\dfrac{2\tan(a)+\tan(a)-\tan^3(a)}{1-\tan^2(a)}\cdot \dfrac{1-\tan^2(a)}{1-3\tan^2(a)} = \dfrac{2\tan(a)+\tan(a)-\tan^3(a)}{1-3\tan^2(a)}$

8 0

2 years ago

Am i doing this right?

Vaselesa [24]

Yes you are doing it right

3 0

2 years ago

Read 2 more answers

Simplify \frac{36 + 15x}{x} . Identify any excluded values.

trasher [3.6K]

Answer: 36/x + 15 ; x ≠ 0 .<span>
____________________________________________________</span>
x $\neq$ 0 ;
____________________________________________________
(36 + 15x) / x)

= 36/x + 15x/x ;
_____________________________________________________
= 36/x + 15 ; x ≠ 0 .
<span>_____________________________________________________</span>

6 0

2 years ago

Is 200/345 less than 450?

lidiya [134]

Answer:

Yes it is!

Step-by-step explanation:

If you take 200 and divide that by 345 than you'll get 0.57.

200 ÷ 345
0.579710

Round 2 decimal places? ⇒ 0.58

Round 3 decimal places? ⇒ 0.580

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3 0

2 years ago