Answer:
Tahiya attempted 3 incorrect answers.
Helmin attempted 11 incorrect answers.
Step-by-step explanation:
Correct = +4
Incorrect = -3
1) Tahiya got 12 correct answers and scored a 40, the number of incorrect answers was:
2) Helmin got 5 correct answers and scored a -14, the number of incorrect answers was:
In both cases the number of incorrect answers obtained is a fraction, which means that either the data provided is inaccurate, or that the scores obtained by the students are approximate. Let's round the number of incorrect answers to the nearest whole answer.
Tahiya attempted 3 incorrect answers.
Helmin attempted 11 incorrect answers.
Answer:
Number of boys = 6
Step-by-step explanation:
It is given that:
Number of girls in school club = 16
Let,
b be the number of boys.
g be the number of girls.
g = 2b + 4
Putting g=16
16 = 2b + 4
16 - 4 = 2b
2b = 12
Dividing both sides by 2
Therefore,
Number of boys = 6
Answer:
The amount they charged to wash a car is <u>$6</u> and vacuum a car is <u>$2</u>.
Step-by-step explanation:
Given:
Trisha and Byron are washing and vacuuming cars to raise money for a class trip.
Trisha raised $38 washington 5 cars and vacuuming 4 cars.
Byron raises $28 by washing 4 cars and vacuuming 2 cars.
Now, to find the amount they charged to wash a car and vacuum a car.
Let the amount charged for washing a car be
And the amount charged for vacuuming a car be
So, the total amount Trisha raised:
.......(1)
And, the total amount Byron raised:
Now, to get the amount they charged to wash a car and vacuum a car we use elimination method:
<em>Dividing both sides by 3 we get:</em>
<u>Amount charged to wash a car = $6.</u>
Now, putting the value of in equation (1) we get:
<em>Subtracting both sides by 30 we get:</em>
<em>Dividing both sides by 4 we get:</em>
<u>Amount charged to vacuum a car = $2.</u>
Therefore, the amount they charged to wash a car is $6 and vacuum a car is $2.