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Bess [88]
3 years ago
7

The length of a rectangle is 3 cm less than twice the width. If the perimeter is 42 cm, what is the length of the rectangle?

Mathematics
1 answer:
larisa [96]3 years ago
6 0

Answer:

The length is 13

Step-by-step explanation:

w+w+l+l= perimeter

if the length is 3m less than twice the width then let's do some math.

42 divided 2 =21. so the width and length of one side have to equal 21. For example, let's use 8 as the width. The length would be twice(16) minus three(13) 13 plus 8 is 21. WOW it equals half of it so no we know the length is 13 and the wdith is 8.

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Algebraic 3 more than 5 times a number
artcher [175]

Answer:

5x+3

Step-by-step explanation:

substitute x for the unknown number

8 0
3 years ago
Plz help
Semenov [28]
This is a classic example of Scientific Notation. 
5.3 x 10^5 actually equals 530,000
3.8 x 10^4 actually equals 38,000
Since it is asking for the sum of the numbers you are adding.
Your new equation look like this:
530,000 + 38,000 
= 568,000
now all you have to do is count the decimal points. You start from the end zero and count the spaces in between until you get to the tenths place. (Right behind the first number) There are 5
So your answer will be:
 B. 5.68 x 10^5.
5 0
3 years ago
PLEASE HELP WITH 1-2!!!!
ratelena [41]
1-2 = -1
If that's what u mean
3 0
3 years ago
Tan(42)= x over 16<br> I need the answer and how ya got it pleasee
xz_007 [3.2K]

Answer:

14.40646471 =x

Step-by-step explanation:

tan (42) = x/16

Multiply each side by 16

16 tan 42 = x/16 *16

16 tan 42 = x

16 * .900404044 = x

14.40646471 =x

7 0
3 years ago
4) Change the recurring decimal 0.18 to a fraction. (2marks)<br> You must show all your working.
yuradex [85]

Answer:

18/100 or 9/50

Step-by-step explanation:

First, put 0.18 over 100 because there are 2 digits in the decimal, so you convert it to 18/100. Then, simplify it, and because the GCF is 2, divide the numerator and denominator. The final fraction ins 9/50.

8 0
2 years ago
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