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3 years ago

After spending 80% of gulnaza's money. she left with $800. How much did she have in the beginning

Mathematics

1 answer:

Snezhnost [94]3 years ago

7 0

Answer:

After spending 80% of her money ,Divya is left with 800. How much money did she have in the beginning? 2. See answers. Log in to ...

Missing: gulnaz's ‎| Must include: gulnaz's

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A point P(x,y) moves along the graph of the equation y = x3 + x2 + 2. The x-values are changing at the rate of 2 units per secon

CaHeK987 [17]

Using implicit differentiation, it is found that y is changing at a rate of 10 units per second.

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The equation is:

$y = x^3 + x^2 + 2$

Applying implicit differentiation in function of t, we have that:

$\frac{dy}{dt} = 3x^2\frac{dx}{dt} + 2x\frac{dx}{dt}$

x-values changing at a rate of 2 units per second means that $\frac{dx}{dt} = 2$
Point Q(1,4) means that $x = 1, y = 4$ .

We want to find $\frac{dy}{dt}$ , thus:

$\frac{dy}{dt} = 3x^2\frac{dx}{dt} + 2x\frac{dx}{dt}$

$\frac{dy}{dt} = 3(1)^2(2) + 2(1)(2) = 6 + 4 = 10$

y is changing at a rate of 10 units per second.

A similar problem is given at brainly.com/question/9543179

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2 years ago

A painter is placing a ladder to reach the third story window, which is 11 feet above the ground and makes an angle with the gro

grandymaker [24]

Answer:

x = 1.91 ft

Step-by-step explanation:

We use cosine because we are dealing with Adj and Hyp

cos 80 = x/11

x = 11 cos 80

x = 1.91 ft

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3 years ago

EX 1) Games Galore Super Store buys the latest video game at a wholesale price of $30.00. The markup rate at Game's Galore Super

nataly862011 [7]

Answer:

$42

Step-by-step explanation:

Given that,

Galore Super Store buys the latest video game at a wholesale price of $30.00.

The markup rate at Game's Galore Super Store is 40%.

We need to find the price from the store. It can be calculated as follows :

$C=30+\dfrac{40}{100}\times 30\\\\=30+12\\\\=\$42$

Hence, we will pay $42.

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2 years ago

If x varies directly with y and x = 3.5 when y = 14, find x when y = 18.

maks197457 [2]

Answer:

x = 4.5

Step-by-step explanation:

there's definitely other ways to solve this, but I used a proportion.

$\frac{3.5}{x} = \frac{14}{18}$

Then you can make this equation:

14x = 3.5 * 18

I solved for it and got 4.5 .

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3 years ago

-7x+14=4x-19 please help w/ answer

Vladimir79 [104]

The correct answer is x=3. Hope this helps!!

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3 years ago

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