x - cost of karate lessons
y - cost of ballet lessons
{x + y = 80
{x + 10 = 2y
{x = 80 - y
{80 - y + 10 = 2y
{x = 80 - y
{90 - y = 2y | + y
{x = 80 - y
{90 = 3y | : 3
{x = 80 - y
{y = 30
{x = 50
{y = 30
<u>Answer: He spends on ballet lesson $30.</u>
A. 81
b. no entiendo la pregunta
c. 32
d. 64
e. 81
f. 1000
Answer:
20
Step-by-step explanation:
So to get 20 all you had todo was multiply 20,000 by 0.001, because milliliters converted into liters is 1 milliliter= 0.001 liters.
Answer:
x = 56
Step-by-step explanation:
Since two sides of the triangle have the same length, we knows it's isosceles. This means we we will have two base angles with the same value. Since x is the angle in between both legs, we knows x is the vertex angle.
62 is a base angle, which means the other base will be 62 as well. And since the angles of a triangle always add up to 180,
x = 180 - (62 + 62)
x = 180 - 124
x = 56
It would be
-3u-18-6u
If you simplify this it would be -8u-18