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saveliy_v [14]
3 years ago
7

The perimeter of a rectangle is 48 centimeters. The relationship between the length, the width, and the perimeter of the rectang

le can be described with the equation: 2 • length + 2 • width = 48. Find the length, in centimeters, if the width is
A.20.4
B. 24.1
C.21.4
D.22.3
Mathematics
1 answer:
vaieri [72.5K]3 years ago
8 0
Probably A I am not really sure I am trying sorry if it is wrong
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Only two problems I don’t understand. Don’t just give me answer, explain too please.
marta [7]

Answer:

12. Option b: 20 is the correct answer.

13. Option a: A rose costs $1 more than a daisy is the correct answer.

Step-by-step explanation:

12. Given that:

15x+10y=700       Eqn 1

x+y=60      Eqn 2

To find x, we will eliminate y be multiplying Eqn 2 by 10

10(x+y=60)

10x+10y=600      Eqn 3

Subtracting Eqn 3 from Eqn 2

(15x+10y)-(10x+10y)=700-600

15x+10y-10x-10y=100

5x=100

Dividing both sides by 5

\frac{5x}{5}=\frac{100}{5}\\x=20

Hence,

Option b: 20 is the correct answer.

13. Given that:

5x+4y=32     Eqn 1

x+6y=22       Eqn 2

Multiplying Eqn 2 by 5

5(x+6y=22)

5x+30y=110     Eqn 3

Subtracting Eqn 1 from Eqn 3

(5x+30y)-(5x+4y)=110-32

5x+30y-5x+4y=78

26y=78

Dividing both sides by 26

\frac{26y}{26}=\frac{78}{26}\\y=3

Putting y=3 in Eqn 2

x+6(3)=22

x+18=22

x=22-18

x=4

Hence,

Option a: A rose costs $1 more than a daisy is the correct answer.

7 0
3 years ago
Is 3,540 reasonable for the difference 9,760-5,220
Ugo [173]

Answer:

no it's 4540

Step-by-step explanation:

you just subtract 5220 from 9760 and you get your difference

3 0
3 years ago
Find (f×g)(x) when f(x)=x^2+8x+15 and g(x)=5 over x^2-9
Kipish [7]
Look at the picture......

5 0
3 years ago
Help now plz asphejdjdb
Cloud [144]

Answer:

l:4

w: 3

l:4

w:1

Step-by-step explanation:

Hope this helps

8 0
2 years ago
How do I solve this?
Aleksandr-060686 [28]
First you have to set up your equation. 5x+80 and x+15. 
8 0
3 years ago
Read 2 more answers
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