3 years ago

Please help. Algebra.

Mathematics

2 answers:

Paladinen [302]3 years ago

7 0

Answer:

Answers are C and D

Step-by-step explanation:

Hope this helps

diamong [38]3 years ago

6 0

The answers are c and d ;)

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The quotient of 9 times an unknown number and 16 is 81. What is the value of the unknown number?

riadik2000 [5.3K]

Quotient means division.

(9x)/16 = 81

9x = 1296

x = 144

The unknown number is 144.

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3 years ago

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Determine which situation could be represented by the system of linear equations given below

Rudiy27

The answer is
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2 years ago

the length of a rectangle is 4 meters longer than the width. if the area is 22 square meters , find the rectangle dimension

Readme [11.4K]

Let breadth be x

Length=x+4

We know

$\boxed{\sf Area_{(Rectangle)}=Length\times Breadth}$

$\\ \sf\longmapsto x(x+4)=22$

$\\ \sf\longmapsto x^2+4x=22$

$\\ \sf\longmapsto x^2+4x-22=0$

By solving

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3 years ago

Any help with this greatly appreciated.

Anestetic [448]

Put the equation in standard linear form.

$x'(t) + \dfrac{x(t)}{t + 5} = 5e^{5t}$

Find the integrating factor.

$\mu = \exp\left(\displaystyle \int \frac{dt}{t+5}\right) = e^{\ln|t+5|} = t+5$

Multiply both sides by $\mu$ .

$(t+5) x'(t) + x(t) = 5(t+5)e^{5t}$

Now the left side the derivative of a product,

$\bigg((t+5) x(t)\bigg)' = 5(t+5)e^{5t}$

Integrate both sides.

$(t+5) x(t) = \displaystyle 5 \int (t+5) e^{5t} \, dt$

On the right side, integrate by parts.

$(t+5) x(t) = \dfrac15 (5t+24) e^{5t} + C$

Solve for $x(t)$ .

$\boxed{x(t) = \dfrac{5t+24}{5t+25} e^{5t} + \dfrac C{t+5}}$

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2 years ago

Helpndmdkdkdndnfndndkdkdmd

alekssr [168]

I read this story last year for my 7th grade year. The correct answer is A!

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3 years ago