3 years ago

C)

Mathematics

2 answers:

Anestetic [448]3 years ago

5 0

Answer:

d)25cm,20cm

c)6,3

Step-by-step explanation:

d)P=2(l+b)

90=2(l+b)

l+b=90/2

l+b=45

A=l×b

500=lb

l=45-b

500=(45-b)b

500=45b-b²

b²-45b+500=0

b²-25b-20b+500=0

b(b-25)-20(b-25)=0

(b-20)(b-25)=0

b=20 or b=25

c)a×b=18

a+b=9

a=9-b

(9-b)b=18

9b-b²=18

b²-9b+18=0

b²-6b-3b+18=0

b(b-6)-3(b-6)=0

(b-3)(b-6)=0

b=3 or b=6

Alexxx [7]3 years ago

5 0

Answer:

d)2cm,d)20cm

c)6,3 answer

You might be interested in

11 dived by 2=<br> Long divination pls help

andreyandreev [35.5K]

Answer:

5.5

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

How much more money do 10 T-shirts cost that 6 T-shirts? Explian how you found your answer.

Solnce55 [7]

Well if the t-shirts are the same amount of money per shirt, then you simply work it out like this.
EXAMPLE
1 t-shirt = $10
So if you need to buy 10 you just multiply 10 by 10.
10x10= $100
Also if you need to find the difference between buying 6 or 10 you subtract the two numbers which would be 4 then divide 100 by 4.
<span />

7 0

3 years ago

Read 2 more answers

What is the value of X?<br><br>

Blababa [14]

Answer:

x = 1

Step-by-step explanation:

Triangle ABC is congruent to Angle DEF

13x - 12 = 7x - 6

6x = 6

x = 1