Answer:
(-16,2)
Step-by-step explanation:
x= −8y
−x+y= 18
substitute for x:
-(-8y) + y = 18
8y + y = 18
9y = 18
divide both sides by 9:
y = 2
x = -8(2) = -16
By my calculations id say its 0.5 m/s^2.
Answer:
distance across the pond: 13 yd
distance walked by Garret: 12 yd
Step-by-step explanation:
Data:
- distance across the pond: x yd
- distance walked by Sandy: 5 yd
- distance walked by Garret: x-1 yd
A right triangle is formed where the distance across the pond is the hypotenuse. From Pythagorean theorem:
x² = 5² + (x-1)²
x² = 25 + x² - 2x + 1
0 = 26 - 2x
x = 13
Answer: Option C is correct.
<h3><u>Part A</u></h3>
⇒ 4x = 20
⇒ x = 20/4
⇒ x = 5
<h3><u>Part B</u></h3>
⇒ x/2 = 8
⇒ x = 8(2)
⇒ x = 16
<h3><u>Part C</u></h3>
⇒ x + 8 = 3x
⇒ 3x - x = 8
⇒ 2x = 8
⇒ x = 4
<h3><u>Part D</u></h3>
⇒ x = (x + 5)/2
⇒ 2x = x + 5
⇒ 2x - x = 5
⇒ x = 5
Answer:
There are 25 students in Hannah's class.
Step-by-step explanation:
If 20 students in Hannah's class is 80% of the total amount of students, we can use a variable to figure out the total amount of students.
Let's say x is the total amount of students. We can use this equation to solve the problem:
This is saying 20 equals 80% (.8 when you move the decimal 2 times) of x, or the total amount of students. Let's solve.
20 = .8x
Divide by .8
25 = x
There are 25 students in Hannah's class.
