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3 years ago

Hi can any one please help please I really need help please help me thank you

Mathematics

1 answer:

photoshop1234 [79]3 years ago

5 0

Answer:

Length = 31cm

Width = 10cm

Step-by-step explanation:

$Let -the-length-be : x\\Let-the-width-be :y\\\\According- to- the- question ; \\x = 3(y)\\x=3y ---------(1)\\2(l+w)=82\\2(x+y)=82\\2x+2y =82 --------(2)\\Substitute- the - given- value- for ; x -in - equation---(1) into -equation (2)\\2(3y)+2y =82\\6y+2y=82\\8y =82\\\frac{8y}{8} =\frac{82}{8} \\y = 10.25\\\\Substitute 10.25 -for ;y -in -eq 1\\x=3y ---------(1)\\x = 3(10.25)\\x = 30.75$

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Help me llliad plz neeeeeeed help

Lapatulllka [165]

Lets get started :)

Diameter = 2.5 ft
Radius = $\frac{diameter}{2} = \frac{2.5}{2} = 1.25$

a) The Circumference formula of a circle is given in the picture below, we can plug-in the given information

C = 2 $\pi$ (1.25) or 2.5 $\pi$
≈ 7.85 ft
(we can leave the answer in terms of pi { $\pi$ })

b) We divide the total number of distance the tire will travel by the circumference to find how many times the tire will roll

$\frac{5280}{circumference} = \frac{5280}{2.5 \pi }$
(I have used the value in feet because we found the circumference in feet units and notice that I took the value of circumference to be 2.5 $\pi$ instead of 7.85, to increase accuracy)

672.2

The tire will rotate 672 times (a tire cannot roll a decimal times, so we take to the nearest whole number) to travel 1 mile

7 0

3 years ago

A combination lock has 3 dials. The first 2 dials have a setting for digits 0 through 9, and the third has settings for all 26 l

NeTakaya

Answer:

There is 2600 combinations possible.

Step-by-step explanation:

The combinations for the first lock has 10 combinations

The combinations for the second lock has 10 combinations

The combinations for the third lock has 26 combinations

The total combinations is the product of all the locks.

There is 2600 combinations possible.

7 0

3 years ago

1.) Mr Rick can eat 12 dove chocolates every time Mr. Jones eats 7.

Nataly_w [17]

Answer:

12:7 and 5:8

Step-by-step explanation:

first one just put the 2 together and the second one you have mr. brown and then the second number add the 2

8 0

3 years ago

Read 2 more answers

6|2x+3|=36 need a mini step by step

ELEN [110]

Answer:

x=1.5

Step-by-step explanation:

We are trying to get x by itself to see what it equals.

6(2x+3)=36

So first you want to distribute you proprieties. You do that by multiplying 6 and 2x. Then multiplying 6 and 3.

12x+18=36

Now in equations where you need to find the variable, whatever you do on one side of the equal sign, you have to do on the other side. So now we want to subtract 18 from both sides.

12x+18=36

-18 -18

Then we divide 12 from both sides.

12x=18

÷12 ÷12

Now you have your answer!

x=1.5

6 0

3 years ago

What is the square root of 25/49?

wel

<span>square root of 25/49
They are perfect square root
25 = 5^2
49 = 7^2

so 25/49 = 5^2 / 7^2</span>

5 0

3 years ago