All categories

4 years ago

Can someone help me with this problem [-64x(-5)-2x(3)]

Mathematics

2 answers:

galina1969 [7]4 years ago

5 0

The answer is 314
(^o^)

Leni [432]4 years ago

3 0

314 is the answer. I hope I helped.

You might be interested in

A field is 140 yards long and 90 yards wide. find its area in square feet

Debora [2.8K]

Convert the yards to feet.

1 yard = 3 feet.

140 yards x 3 feet per yard = 420 feet.

90 yards x 3 feet per yard = 270 feet.

Area = 420 x 270 = 113,400 square feet.

3 0

4 years ago

Find the next number in the number sequence 3, 6, 10, 15.

natulia [17]

Answer:

Step-by-step explanation:

3 + 3 = 6

6 + 4 = 10

10 + 5 = 15

so...

15 + 6 = 21

6 0

4 years ago

Read 2 more answers

Integrate dx/3sinx+4cosx

german

$\displaystyle\int\frac{\mathrm dx}{3\sin x+4\cos x}$

A standard approach would be the tangent half-angle substitution:

$t=\tan\dfrac x2\implies\mathrm dt=\dfrac12\sec^2\dfrac x2\,\mathrm dx$

Then

$\sin x=2\sin\dfrac x2\cos\dfrac x2\implies\sin x=\dfrac{2t}{1+t^2}$

$\cos x=\cos^2\dfrac x2-\sin^2\dfrac x2\implies\cos x=\dfrac{1-t^2}{1+t^2}$

from which we get

$\mathrm dx=\dfrac2{1+t^2}\,\mathrm dt$

So the integral becomes

$\displaystyle\int\frac{\frac2{1+t^2}}{\frac{6t}{1+t^2}+\frac{4(1-t^2)}{1+t^2}}\,\mathrm dt=\int\frac{\mathrm dt}{3t+2(1-t^2)}=-\int\frac{\mathrm dt}{2t^2-3t-2}$

Rewrite the denominator as

$2t^2-3t-2=(2t+1)(t-2)$

and expand the integrand into its partial fractions:

$\dfrac1{2t^2-3t-2}=\dfrac15\left(\dfrac1{t-2}-\dfrac2{2t+1}\right)$

We have

$\displaystyle-\frac15\int\frac1{t-2}-\frac2{2t+1}\,\mathrm dt=-\frac15(\ln|t-2|-\ln|2t+1|)+C$

$=\dfrac15\ln\left|\dfrac{2t+1}{t-2}\right|+C$

$=\dfrac15\ln\left|\dfrac{2\tan\frac x2+1}{\tan\frac x2-2}\right|+C$

6 0

3 years ago

Answer pleaseeeee<br> Find the value of x in the triangle shown below.

Maurinko [17]

well, keeping in mind that twin sides stemming from the same "vertex" make twin angles at the "base", Check the picture below.

7 0

1 year ago

Any answers? My last question. ;-;

faltersainse [42]

? 42
sorry if i’m wrong

7 0

3 years ago

Read 2 more answers