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Serhud [2]
3 years ago
9

Express - 64 by 112 as a rational number with denominator 7​ .plz answer fast so l will follow you .

Mathematics
2 answers:
solniwko [45]3 years ago
8 0

Answer:

-4/7

Step-by-step explanation:

When we simplify the fraction -64/112, we get -4/7.

mariarad [96]3 years ago
8 0

Answer:

-4/7

Step-by-step explanation:

-64/112 is already a rational number.

Simplify the fraction.

= -4/7

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Does any one know 7,8???
Lady_Fox [76]

Answer:

7. (7^2)(4^2) or 49 * 16

8.18^5

Step-by-step explanation:

7. You can do that or simplify the exponents.

8. When dividing two exponents you can subtract the exponentes. *(note i didn't simplify 18^5 because it said expression, and a simplified number is not an expression.)

5 0
3 years ago
Read 2 more answers
What is the antiderivative of sin^2(x)cos^2(x)?
marin [14]

Answer:

\frac{x}{8}-\frac{\sin(4x)}{32}+C

Step-by-step explanation:

[Most of the work here comes from manipulating the trig to make the term (integrand) integrable.]

Recall that we can express the squared trig functions in terms of cos(2x). That is,

\cos(2x)=2\cos^2x-1 \\ \cos(2x)=1 - 2\sin^2x.

And so inverting these,

\cos^2x=\frac{1}{2} (1+\cos2x) \\ \sin^2x=\frac{1}{2} (1-\cos2x).

Multiply them together to obtain an equivalent expression for sin^2(x)cos^2(x) in terms of cos(2x).

\sin^2x \cdot \cos^2x =\frac{1}{2} (1-\cos2x) \cdot \frac{1}{2} (1+\cos2x) = \frac{1}{4}(1-\cos^2(2x)).

Notice we have cos^2(2x) in the integrand now. We've made it worse! Let's try plugging back in to the first identity for cos^2(2x).

\cos(2x)=2\cos^2x-1 \Rightarrow \cos(4x)=2\cos^2(2x)-1 \Rightarrow \cos^2(2x) = \frac{1}{2}(1+\cos(4x))

So then,

\sin^2x \cdot \cos^2x = \frac{1}{4}(1-\cos^2(2x)) = \frac{1}{4}(1-\frac{1}{2}(1+\cos(4x))) = \frac{1}{4}(1-\frac{1}{2}-\frac{1}{2}\cos(4x))=\frac{1}{8}(1-\cos(4x)).

This is now integrable (phew),

\int \sin^2x\cos^2x \ dx = \int \frac{1}{8}(1-\cos(4x)) \ dx = \frac{1}{8} \int (1-\cos(4x)) \ dx = \frac{1}{8}(x-\frac{1}{4}\sin(4x))+C.

7 0
3 years ago
Se x e um número real tal que 3x +1/2 > 2x - 5, então podemos afirmar que;
Crazy boy [7]

Step-by-step explanation:

3x +  \frac{1}{2}  > 2x - 5 \\ x  >  - 5 \frac{1}{5}

7 0
3 years ago
What value of z makes this equation true?
Ymorist [56]

Answer:

B. 66

Step-by-step explanation:

73+25 = 98

Z = 98-32

Z = 66

5 0
3 years ago
What is the step by step answer of 3 + 1 1/4=
ivann1987 [24]
Ok so first u would add 3+1 which gives u 4 and then add 1/4 which should give u 4 1/4
6 0
3 years ago
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