Ask question

Ask question

All categories

3 years ago

10

The perimeter of rectangle ABCD is 42 cm and the area is 80 cm2. Which equation can be used to find the dimensions of the rectan

gle? (Hint: Set up a system of equations).
xy + 2x + 2y = (42)(80)
x^2 + 80x - 42 = 0
x^2 - 42x + 80 = 0
x^2 - 21x + 80 = 0

1 answer:

Nikolay [14]3 years ago

4 0

Don't hold me accountable but I believe it is the 2nd equation.

You might be interested in

Find the missing angle.

Wittaler [7]

The triangle to the top right is missing one angle. We know the sum of all angles in a triangle add up to 180 degrees. We already have 35 + 90 = 125 degrees, so the last angle must be 55 degrees. That angle is verticle to another angle, which you should be able to notice (also 55 degrees because vertical angles are congruent). Now, we have 67 + 55 = 122 degrees in that triangle. It must add up to 180, so the unknown angle is 58 degrees.

5 0

3 years ago

Solve the following proportion 16/18 = 4/c

tamaranim1 [39]

Answer:

16/18 4/36

Step-by-step explanation:

im sorry i dont know

7 0

2 years ago

is picking out some movies to rent, primarily interested in horror films and comedies. He has narrowed down his selections to 15

tigry1 [53]

Answer: 31,365

Step-by-step explanation:

Given : The number of horror films = 15

The number of comedies = 18

Then , the number of different combinations of 4 movies can he rent if he wants at least two comedies is given by :-

$^{18}C_2\times ^{15}C_2+^{18}C_3\times ^{15}C_1+^{18}C_4\times ^{15}C_0\\\\=\dfrac{18!}{2!(18-2)!}\times\dfrac{15!}{2!(15-2)!}+\dfrac{18!}{3!(18-3)!}\times\dfrac{15!}{1!(15-1)!}+\dfrac{18!}{4!(18-4)!}\times\dfrac{15!}{0!(15-0)!}\\\\=16065+12240+3060=31365$

Hence, the number of different combinations of 4 movies can he rent if he wants at least two comedies = 31,365

7 0

3 years ago

Help me out here pleaseeeeeee

lord [1]

Answer : C (24 - 6) ÷ 3

(almost 100% sure this is correct lol)

8 0

3 years ago

Read 2 more answers

My question is ...champ is 1st in a race star is 3rd and Pom is 4th if 2 more horses pass star what place will Pom be in? HELP P

Ad libitum [116K]

Pom would be in 6th place

3 0

3 years ago