Jamal's score is 80
<u>Explanation:</u>
Given:
Number of questions = 100
Let w be the number of wrong answers
Let r be the number of right answers
According to question,
r = 4w
r + w = 100
Solving both the equations we get:
4w + w = 100
5w = 100
w = 20
If w = 20 then r = 4 X 20 = 80
Therefore, Jamal's score is 80
Answer: A
Step-by-step explanation:
Nothing you a bum
Speed
Riding speed = 9 mph
Driving speed = 27 mph
Time
If x hours is the time taken when riding, (x - 1/3) hours is the time taken when driving.
Distance in both instances is the same, D= Speed * time
Therefore,
9*x = 27(x-1/3)
9x = 27x - 27/2
9x = 27x - 9
(9-27)x = -9
-18x = -9
x = 9/18 = 1/2 hours
Distance, D = 1/2 *9 = 4.5 miles
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❖ A number y increased by 5 is at least -21.

❖ First, if you come across the word "increased" it means we
"increase" a number, or add something to that number, like
y increased by 5

Now, we are also given that this expression is at least -21, which means it can't be -21; it can be -21 or it can be greater than -21.
So we have

<em>Solving for y</em>
<em></em>
- Subtract 5 on both sides:-


So the values of y greater than or equal to -26 will make this inequality true.
<h3>Good luck with your studies.</h3>

Answer:
1. k=53.244 or k=13311/250