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3 years ago

Paula weeded 40% of her garden in 8 minutes. How many minutes will it take her to weed all of her garden?

Mathematics

2 answers:

Anton [14]3 years ago

6 0

So do

Part=percent*whole

VLD [36.1K]3 years ago

5 0

Answer:

It would take her 20 minutes to weed her entire garden

Step-by-step explanation:

We can find this by taking the amount of time it took and dividing that by the percentage of the total garden that got weeded in that time.

8mins/40% = 20 mins

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Find the exact value of tan22.5 using the half angle formula.

mote1985 [20]

Tan(a/2) = sin a / (1 + cos a)
tan(45/2) = sin(45) / (1 + cos(45)) = (1/√2) / (1 + 1/√2) = (1/√2) / (√2 + 1)/√2 = 1/(√2 + 1) = (√2 - 1)

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2 years ago

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Find the absolute maximum and minimum values of the following function on the given interval. If there are multiple points in a

Bond [772]

$f(x)=3\sin x+3\cos x\implies f'(x)=3\cos x-3\sin x$

$f$ has critical points where $f'=0$ :

$3\cos x-3\sin x=0\implies\cos x=\sin x\implies\tan x=1\implies x=\pm\dfrac\pi4+2n\pi$

where $n$ is any integer. We get solutions in the interval $\left[0,\frac\pi3\right]$ for $n=0$ , for which $x=\frac\pi4$ .

At this critical point, we have $f\left(\frac\pi4\right)=3\sqrt2\approx4.243$ .

At the endpoints of the given interval, we have $f(0)=3$ and $f\left(\frac\pi3\right)=\frac{3+3\sqrt3}2\approx4.098$ .

So we have the extreme values

$\max\limits_{x\in\left[0,\frac\pi3\right]}f=3\sqrt2$

$\min\limits_{x\in\left[0,\frac\pi3\right]}f=3$

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3 years ago

if a line contains a the point (0,-1) and has a slope of 2 which of the following points also lies on the line

Fudgin [204]

Answer:

I think 1 1

Step-by-step explanation:

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3 years ago

Can someone help me with this i have been trying for hours and i actually got the wrong answer so can you help me understand by

kap26 [50]

Answer:

Step-by-step explanation:

We are given that FGH is a triangle, which means that...

Angle F + Angle G + Angle H = 180

Start by substituting the given angle measurements into the equation:

4x+2+13x-7+3x+5=180

Combine like terms

20x=180

Divide both sides by 20 to isolate x

x=9

Plug 9 back in for x to solve for each angle

Angle F = 4(9)+2=36+2=38

Angle G = 13(9)-7=117-7=110

Angle H = 3(9)+5=27+5=32

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2 years ago

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Ksivusya [100]

Answer:

24/4

Step-by-step explanation:

all you have to do is multiply 4x6=24

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2 years ago

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