MATHEMATICS MIDDLE SCHOOL

A radio telescope array is in an unpopulated desert region. The array covers a rectangular area that is one fourth square kilometer. The array is one twelfth kilometer wide. How long is the​ array? The array is [blank] kilometers long.

Answers

Answer 1
Answer:

Answer:

  3 km

Step-by-step explanation:

The area of a rectangle is given by the formula ...

  A = LW

Filling in the given information, we can solve for the length.

  1/4 = L·(1/12)

Multiplying by 12, we see that ...

  3 = L

The array is 3 kilometers long.

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What is 21 divided by 4

Answers

Change those messy words to numbers:
21 divided by 4
(21)/(4)
It can either be solved by using a calculator or long division
And we will end up with the answer:5.25
the answer is 5.25 ur welcome

Describe the mental math steps you would use to find 7(42)

Answers

Answer:

7* 42 = 294

Step-by-step explanation:

Distributive property of multiplication over addition:

When a number is multiplied to a sum of two numbers then it can be multiplied to the numbers individually and then add the two products,

It can be written as:

a* (b+c) = (a* b) + (a* c)

Similarly, we can use this property to find the product of 7* 42

7* 42\n= 7* (40+2)\n= (7* 40) + (7* 2)\n= 280 + 14\n= 294

The product of 7 and 42 is 294.
You would find 7*40    7*4=28
So 7*40=280 (just add a zero)
7*2=14
The answer would be 280+14=294

Claude spends $315 to rent a car. The car he rents costs $45 per day. He has a coupon for 2 free days. Complete the equation below to find the number of days Claude rents the car. Use d to represent the number of days.

Answers

315÷45=7,
7+2=9
315 divided by 45 equals 7, then you have two day coupon, so 7+2 =9.

What is the answer to 15=k+8.2

Answers

you answer is K= 7.8

Hi there! :)

Answer:

K=6.8

*The answer must have a decimal point.*

Step-by-step explanation:

First, you switch sides.

k+8.2=15

Then, you subtract by 8.2 from both sides of an equation.

k+8.2-8.2=15-8.2

Subtract by the numbers from left to right.

15-8.2=6.8

Final answer is k=6.8

Hope this helps!

Thanks!

Have a nice day! :)

:D

-Charlie

How do u write 4 1/4 in simplest form and not in decimals I haven't learned that yet .

Answers

It already is in simplest form because the numerator and denonimator don't have a common factor to then divide them by.
Its in simplest form because the numerator and denomenter cant be reduced

2 13/18 −z=1 19/36

Answer

Answers

Answer:

Answer is z= 43/36

Step-by-step explanation:

We have given,

2 13/18 - z = 1 19/36

Since 2 13/18 = 49/18  and 1 19/36 = 55/36

So we can write,

2 13/18 - z = 1 19/36

or 49/18 - z = 55/36

or 49/18 - 55/36 = z

or (98 -55)/36 = z

or 43/36 = z

Hence we got z = 43/36
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