1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anettt [7]
3 years ago
6

1. If the length of a rectangle is decreased by 4 cm and the width is increased by 5 cm, the result will be a square, the area o

f which will be 40 cm2 greater than the area of the rectangle. Find the area of the rectangle.
2.The perimeter of a rectangle is 30 cm. If its length is decreased by 3 cm and its width is increased by 5 cm, the area of the rectangle will decrease by 8 cm2. Find the area of the original rectangle.
Mathematics
1 answer:
iren2701 [21]3 years ago
3 0
Let L be length, W be width
(L-4)=(W+5)
(L-4)(W+5)=LW+40
simplify the first equation: L-W=5

simplify the second equation: (L-4)(W+5)=LW+40
               LW-4W+5L-20=LW+40  =>5L-4W=60
             
solve this system of equations: L-W=9
                                                  5L-4W=60
you get W=15, L=24, so the area is 24*15=360

#3:
(L-3)(W+5)=LW-8
2L=2W=30
W=68/8=8.5, L=52/8=6.5, LW=55.25
You might be interested in
Which of these triangle pairs can be mapped to each other using a translation and a rotation about a point A? Select one answer
Elenna [48]
The answer is the first and the third figure,attached
5 0
3 years ago
Sierra borrows $310 from her brother to buy a lawnmower. She will repay $85 to
Ivanshal [37]
310-85=225
225/25=9
Therefore it will take her 9 weeks
8 0
2 years ago
There are two bottles of tomato ketchup, one weighs 720 g and costs £1.79, while the other weighs 460 g and costs £1.00. Which b
maksim [4K]
To\ find\ better\ value\ for\ money\ you\ can\ find\ price\ of\ 100g:\\\\720:100=72\\460:100=46\\\\1.79:72=0.025\\1.00:46=0.022\\\\460g\ ketchup\ is\ more\ profitable.
8 0
3 years ago
Read 2 more answers
PLEASE HELP ME FIND THE CORDINATES FOR THESE GRAPHSSS PLEASE ILL GIVE YOU BRAINLIEST AND 25 POINTS
tia_tia [17]
1. (-1,-1) (2,-2)
2. (-3,0) (2,0)
3. (-4,-3) (-1,2)
7 0
3 years ago
25 divided by 5<br> IF you get it right I will email you!!!
vlabodo [156]

Answer:

5

Step-by-step explanation:

25/5

5×5=25

5 <---answer

7 0
3 years ago
Other questions:
  • Write the fraction 12 and simplest form
    5·2 answers
  • A coral reef grows 0.15m every week. How much does it grow in 11 weeks?
    15·1 answer
  • When Kaitlin divided a fraction by 1/2, the result was a mixed number. Was the original fraction less than or greater than 1/2?
    13·1 answer
  • A rectangle with a length of 4 cm and a width of 2.5 cm. <br> what is the base?
    5·1 answer
  • A line has a y-intercept of 7 and a slope of 2 . what is it’s equation in slope-intercept form
    8·2 answers
  • Ten times the sum of half a number and 6 is 8
    8·1 answer
  • Rewrite the expression as a complex number in standard form a+bi
    5·1 answer
  • Partial quotients 8 dived by 832
    12·1 answer
  • A zombie walks 6 feet in 10 seconds.
    11·2 answers
  • The following excerpt comes from the international bottled water association:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!