3 years ago

Find the value of each variable.

Mathematics

1 answer:

sineoko [7]3 years ago

7 0

Answer:

19. x = 65

20. x = 12

21. x = 35, y = 85

Step-by-step explanation:

19. 2x -10 = 120

2x (-10 + 10) = (120 +10)

2x/2 = 130/2

x = 65

20. 2x + 4x + 108 = 180

6x + (108 - 108) = (180 - 108)

6x/6 = 72/6

x = 12

21. 2x + 25 = 3x - 10

2x + (25 - 25) = 3x (- 10 - 25)

(2x - 3x) = (3x - 3x) - 35

-x/-1 = -35/-1

x = 35

3x - 10 + y = 180

3(35) - 10 + y = 180

105 - 10 + y = 180

(95 - 95) + y = (180 - 95)

y = 85

You might be interested in

On Carrie’s map, Greenville and North Valley are 4.5 inches apart. The scale on her map is 1 inch = 20 miles. How far is Greenvi

damaskus [11]

Greenville is 90 miles from North Valley.

6 0

3 years ago

I need the answer! Please help me!

AleksAgata [21]

He needs to work 22 hours :)

6 0

3 years ago

Read 2 more answers

What is the product of 3x(x^2+4)

Butoxors [25]

<span>3x(x^2+4)
= 3x^3 + 12x

hope it helps</span>

3 0

3 years ago

Alysha is two years younger than Bryce the sum of their ages is 28 how old is Alysha

vova2212 [387]

Alysha is 13 yrs old while Bryce is 15

5 0

2 years ago

Read 2 more answers

Two opposite sides of a rectangle are each of length x. If the perimeter of the rectangle is 12, then the area, as a function of

Reil [10]

Answer: $x(6-x)$

Step-by-step explanation:

Given : Two opposite sides of a rectangle are each of length x.

Let the other adjacent side be y.

The perimeter of the rectangle is 12 units.

Perimeter of rectangle is given by :-

$P=2(\text{Sum of adjacent sides})\\\\\Rightarrow\ 12=2(x+y)\\\\\Rightarrow\ x+y=\dfrac{12}{2}=6\\\\\Rightarriow\ y=6-x$

The area of rectangle is given by :-

$A=\text{product of two adjacent sides}\\\\\Rightarrow\ A=xy=x(6-x)$

Hence, the area as a function x = $x(6-x)$

7 0

3 years ago

Read 2 more answers