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3 years ago

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Mathematics

1 answer:

nataly862011 [7]3 years ago

8 0

She’ll need at least 27 dollars

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A wheel has a radius of 10 cm. Approximately how far does it travel in 3 revolutions?

Doss [256]

It will travel 7.5 cm a revolution and 7.5 x 3 wound = your answer i believe
lol i hate geomatry

5 0

3 years ago

Answer this please! extra points and brainliest will b given

zaharov [31]

Answer:

add 7 to 9 times k : 7+9k

c cubed minus the product of 5 and q plus 4 : $c^{3} - 5q + 4$

twice r plus 7 is equal to 45 minus r : 2r+7=45-r

Product of h and 4 is subtracted from one-fifth of x is 35 :(h*4) - 1/5*x

one third of the difference bewteen 6 and p is added to 8 : (6-p)+8

7 0

3 years ago

To find the equation of a line, we need the slope of the line and a point on the line. Since we are requested to find the equati

murzikaleks [220]

Answer:

$x-4y+4=0$

$f(x)=\sqrt x$ and x=4

Step-by-step explanation:

We are given that a curve

$y=\sqrt x$

We have to find the equation of tangent at point (4,2) on the given curve.

Let y=f(x)

Differentiate w.r.t x

$f'(x)=\frac{dy}{dx}=\frac{1}{2\sqrt x}$

By using the formula $\frac{d(\sqrt x)}{dx}=\frac{1}{2\sqrt x}$

Substitute x=4

Slope of tangent

$m=f'(x)=\frac{1}{2\sqrt 4}=\frac{1}{2\times 2}=\frac{1}{4}$

In given question

$m=\lim_{x\rightarrow a}\frac{f(x)-f(a)}{x-a}$

$\frac{1}{4}=\lim_{x\rightarrow 4}\frac{f(x)-f(4)}{x-4}$

By comparing we get a=4

Point-slope form

$y-y_1=m(x-x_1)$

Using the formula

The equation of tangent at point (4,2)

$y-2=\frac{1}{4}(x-4)$

$4y-8=x-4$

$x-4y-4+8=0$

$x-4y+4=0$

8 0

4 years ago

A number x decreased by 3 is 5

zysi [14]

Answer:

Step-by-step explanation:

x - 3 = 5

x = 5 + 3

x = 8

Therefore, the number is 8.

5 0

3 years ago

PLS HELP!!!!!!!!!!!!!

stepladder [879]

First, multiply the top equation by 2 and bottom by -3.
60x+60y=900
-60x-75y=-1035
————————
-15y=-135
—————-
-15=-15
y=9

So the answer should be 9.

6 0

3 years ago