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3 years ago

I hate math but plz help

Mathematics

1 answer:

erastovalidia [21]3 years ago

3 0

This answer may be for 7.75 dollars a week for two weeks

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Sum of money is placed at simple interest for 3 years at 10% per annum and then the amount is invested for 2 years at the same r

JulsSmile [24]

Answer:

sum was 300000

Step-by-step explanation:

let sum of money is placed is x rs

Term T = 3 years, rate R = 10%

Then simple interest for for 3 years is

$SI= \frac{PTR}{100}\\ SI=\frac{x\times 3\times 10}{100} \\SI = 0.3x$

Sum of x will become x+0.3x = 1.3x after 3 years. now this 1.3x is kept for compound interest for two years. ie

$A =P[1+R]^t\\471900=1.3x[1+\frac{10}{100} ]^2\\x=\frac{471900}{1.573} \\x=300000$

Sum was 300000

3 0

4 years ago

A hyperbola is given by the equation x^2+2xy−y^2+x = 2. Use implicit differentiation

Mekhanik [1.2K]

$\bf x^2+2xy-y^2+x=2\qquad 
\begin{array}{llll}
(1&,&2)\\
x_1&&y_1
\end{array}\\\\
-------------------------------\\\\
2x+2\left( 1\cdot y+x\frac{dy}{dx} \right)-2y\frac{dy}{dx}+1=0
\\\\\\
2x+2y+2x\frac{dy}{dx}-2y\frac{dy}{dx}+1=0
\\\\\\
\cfrac{dy}{dx}(2x-2y)=-1-2x-2y\implies \cfrac{dy}{dx}=\cfrac{-1-2x-2y}{2x-2y}
\\\\\\
\left. \cfrac{dy}{dx}=\cfrac{2x+2y+1}{2y-2x} \right|_{1,2}\implies \cfrac{2+4+1}{4-2}\implies \cfrac{7}{2}\\\\
-------------------------------\\\\
$

$\bf y-{{ y_1}}={{ m}}(x-{{ x_1}})\implies y-2=\cfrac{7}{2}(x-1)\implies y-2=\cfrac{7}{2}x-\cfrac{7}{2}
\\
\left. \qquad \right. \uparrow\\
\textit{point-slope form}
\\\\\\
\boxed{y=\cfrac{7}{2}x-\cfrac{3}{2}}$

5 0

4 years ago

Can someone help me

IrinaK [193]

Answer:

y=2x

...............mm.

7 0

3 years ago

What is the slope? Help me please

Andrew [12]

Answer: Slope of 2.

Step-by-step explanation:

Start at where the line meets on the y-axis, -7. Then work your way upwards until you see the line align with a value of x, like (1,-5). Then you see a trend of it going up 2 units and over 1. 2/1 or 2 is your slope.

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3 years ago

1. You are planning an extended trip to Mexico. You have a new smartphone to keep in touch with your friends but are concerned a

Anuta_ua [19.1K]

A. $40 is the set price per month and $.035 is the changing rate per minute. If t represents the minutes you use the phone, then you have to multiple that amount by $.035

6 0

3 years ago

￼I hate math but plz help

I hate math but plz help