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3 years ago

Frank's paper airplane glided 78.9 m. Sarah's plane glided 85 m. How many more centimeters did Sarah's plane glide? 1 m= 100 cm

Mathematics

1 answer:

Olegator [25]3 years ago

4 0

Answer:

610 cm

Step-by-step explanation:

78.9 x 100 = 7890 cm 85 x 100 = 8,500 cm

8,500 - 7890 = 610 cm

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To the nearest minute, how long will it take to mow the lawn if 3000yd^2 can be mowed per hour? show your work.

-Dominant- [34]

Answer:

$In\ 1\ minute\ lawn\ can\ be\ mowed=50\ yd^2$

Step-by-step explanation:

$Given,\\\\In\ 1\ hour\ lawn\ can\ be\ mowed= 3000\ yd^2\\\\we\ know\ that\\\\1\ Hour=60\ minutes\\\\In\ 60\ minutes\ lawn\ can\ be\ mowed=3000\ yd^2\\\\In\ 1\ minute\ lawn\ can\ be\ mowed=\frac{3000}{60}\ yd^2\\\\In\ 1\ minute\ lawn\ can\ be\ moved=50\ yd^2$

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3 years ago

How many distinct seven-digit phone numbers can you create from the numbers 4, 4, 5, 6, 7, 7, 7? (e.g. 445-6777 is one example)?

iris [78.8K]

You have 7 numbers, two numbers 4 , one 5, one 6 and three numbers 7.

From these 7 numbers you can create $7!=1\cdot2\cdot3\cdot4\cdot5\cdot6\cdot7=5040$ phone numbers, but they are not all different.

If you have two numbers 4, then you have to divide obtained number by 2! (the number of all possible permutations of two numbers 4) and since you have three numbers 7 you should divide the obtained number by 3! (the number of all possible permutations of three numbers 7). Then

 $\dfrac{5040}{2!\cdot 3!}= \dfrac{5040}{1\cdot2\cdot1\cdot2\cdot3}=420$ .

Answer: You can create 420 different phone numbers.

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3 years ago

The frequency table shows the scores from rolling a dice 10 times.

Karolina [17]

You’re gonna want to start this problem by going to your Calculator and hitting stat and then edit. Once you do that you’re going to want to type in the first column, which is one, two, three etc. Once you’re done with that column, you’re gonna want to hit your right arrow and hit the second column digits into L2. After this, you’re going to go to your stat button switch over to Calc, hit 1 – var stats, and the x with a - above it is the mean.

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2 years ago

Read 2 more answers

Sum and difference tan(135+30)

Mumz [18]

$\tan(x+y)=\dfrac{\sin(x+y)}{\cos(x+y)}=\dfrac{\sin x\cos y+\sin y\cos x}{\cos x\cos y-\sin x\sin y}=\dfrac{\tan x+\tan y}{1-\tan x\tan y}$

So,

$\tan(135^\circ+30^\circ)=\dfrac{\tan135^\circ+\tan30^\circ}{1-\tan135^\circ\tan30^\circ}$

You should know that $\tan135^\circ=-1$ and $\tan30^\circ=\dfrac1{\sqrt3}$

Putting everything together,

$\tan(135^\circ+30^\circ)=\dfrac{-1+\dfrac1{\sqrt3}}{1-(-1)\left(\dfrac1{\sqrt3}\right)}=\dfrac{1-\sqrt3}{\sqrt3+1}=\sqrt3-2$

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4 years ago

Find the distance between the pair of points: (3,−4) and (5,1). Distance =√

Gre4nikov [31]

Answer:

use the distance formula

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3 years ago