Answer:
30
Step-by-step explanation:
A player answers x correct questions and y incorrect questions for a total of 40 questions.
x + y = 40
The score is obtained by subtracting y incorrect answers from two times the x of correct answers. The player's score is 50.
2x - y = 50
Use substitution to solve. Rearrange the first equation so that it is equal to y. Then, substitute the y-value into the second equation.
x + y = 40
y = 40 - x
2x - y = 50
2x - (40 - x) = 50
2x - 40 + x = 50
3x - 40 = 50
3x = 90
x = 30
Since x was made to represent correct answers, the player had 30 correct answers.
To find the area of a parallelogram, you use the area formula:
Area = Base * Height
Then, all you have to do is substitute in your known integers and solve. Therefore:
Area = 15 * 21 2/3
When we multiply these two numbers, we get
Area = 325 square yards or yards
Answer:
I think complementary angles
Answer:
The equation representing the relationship is;
Amount charged to work a dog once a day = $1.25 * Number of days
Step-by-step explanation:
Here, we want to find the equation representing the relationship between the charges and the number of days
Firstly, he charges $6.25 to walk a dog a day for 5 days, the amount charged per day will be $6.25/5 = $1.25
For the 7 days, amount charged = 8.75/7 = $1.25
This means he charges an amount of $1.25 to walk a dog once a day
The equation that represents the relationship is thus;
Amount charged = $1.25 * Number of days
