Remember please that Diagonals of a Rectangle are equal to each other: 3y/5 = 3(y-4)
So
3y = 15(y-4)
3y = 15y - 60
60 = 12y
y = 5 Diagonals are both 3 units
With that you will be able to know which is the answer from your options

3 0

2 years ago

Multiply. (2x2 – 3x)(3x2 + 2x - 1)

exis [7]

Answer:

$-6x^{2}$ –7x + 20

Step-by-step explanation:

(2x2 – 3x)(3x2 + 2x – 1)

(4 – 3x)(2x + 5)

(4*2x) + (4*5) + (–3x*2x) + (–3x*5)

8x + 20 $-6x^{2}$ –15x

$-6x^{2}$ –7x + 20

8 0

2 years ago

A person walks 1/3 mile in 1/9 hour. At what speed is the person walking in miles per hour?

ki77a [65]

Speed (v) could be determined using this following formula
v = distance ÷ time

plug in the numbers
v = $\frac{1}{3} : \frac{1}{9}$
v = $\frac{1}{3} \times \frac{9}{1}$
v = 9/3
v = 3

The speed is 3 miles per hour

4 0

3 years ago