Mathematics Quiz 2

correctly answer the following multiple choice questions
Quiz by imanoob1713
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Last updated: March 2, 2019
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First submittedFebruary 28, 2019
Times taken42
Average score50.0%
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1. 7^2
56
14
49
9
2. 9(99-9+11)
1009
99
909
999
3. If (x+3)(x-2)(x+4)=0, what are the x values when the cubic graph intersects the x-axis?
3, 2, 4
3, -2, 4
-3, 2, 4
-3, 2, -4
4. (9)^(1/2)
3
+3 or -3
81
-3
5. 3!
6
8
3
7
6. what is the simplified equivalent of √99
√99
3√11
9√3
33
7. Robert has a bag of 37 sweets. His 5 friends ask Robert for some sweets. If the friends each receive the same number of sweets, but Robert has the most, what is the maximum number of sweets one friend can get?
8
7
9
6
8. Matthew has 40 sweets. He eats two fifths of them and his two friends ask to share the last sweets and save him 6 for later. How many sweets does one friend receive?
6
8
9
12
9. What is the equation to find the arc length of a random arc when using radians?
l=rθ
l=μr
l=(r^2)*d
s=(r^2)μ
10. What is the equation used to determine the number of real roots of a curve?
(a^2)=(b^2)+(c^2)-2bc*cos(A)
(a^2)=(b^2)+(c^2)
b^2-4ac
(a^2)-b=(c^2)
+1
Level 37
Mar 1, 2019
Can you explain the answer for the Robert sweet question? I answered 6. 5 friends would receive 6 sweets, leaving 7 sweets for Robert.
+1
Level 19
Mar 2, 2019
Each friend has to have the same number of sweets. Let the number of sweets one friend gets be x. So the total number of sweets the 5 friends gets is 5x. Let the number of sweets Robert gets be y. Robert has to have more sweets than one friend so y has to be greater than x. Then you have to guess the maximum number of sweets one friend gets whilst satisfying the inequality. The answer being Robert gets 7 and each friend gets 6, as 5 times 6 add 7 is equal to 37.

I hope this helps you.