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andrew-mc [135]
3 years ago
12

A national standardized test is graded on a scale from 1 to 5 the scores for a particular school are given below if a student Is

chosen at random what is the possibility that they scored a 4 or a 5
Mathematics
1 answer:
ra1l [238]3 years ago
6 0

Answer:

Step-by-step explanation:

The possibility of scoring a 4 is 1/5

The possibility of scoring a 5 is 1/5

The possibility of scoring either 4 or a 5 is 2/5

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- (A) The following data was received from the Student Affairs Unit of the University
ladessa [460]

Answer: i) 30 students for chemistry

ii) 21 students for only one subject

iii) 61 students

Step-by-step explanation: from the question we got 30 students registered for chemistry. number students only for biology = (27-18) = 9

number of students only for chemistry = (30-18) = 12

number of student registered for only one subject = (12+9)= 21

number of students registered for neither two subjects = {100-(9+12+18)} = 61

5 0
3 years ago
A flower pot’s base has six sides that are all the same length. Each side measures x−6x-6 units. The base’s perimeter is 78 unit
NemiM [27]

Answer: The answer is x = 19.

Step-by-step explanation:  Given that a flower pot has a base with six equal sides of measurement (x - 6) units. We are to find the value of the unknown quantity 'x' if the perimeter of the base is 78 units.

We know that the perimeter of a polygon is given by the sum of the lengths of all the sides of the polygon.

Since each side of the six-sided base is (x - 6) units, so its perimeter will be

6\times(x-6)~\textup{units}.

According to the question, we have

6(x-6)=78\\\\\Rightarrow x-6=13\\\\\Rightarrow x=19.

Thus, the value of 'x' is 19 units.

6 0
3 years ago
Read 2 more answers
The first three steps in determining the solution set of the system of equations algebraically are shown.
jolli1 [7]
Since both are equivalent to y, the equations must be equivalent.
x^2-x-3= -3x+5
x^2+2x-8=0

(x+4)(x-2)=0
x=-4, x=2

Plug the values of x in to either equation
y=-3(-4)+5
y= 12+5
y=17

y= -3(2)+5
y=-6+5
y=-1

Final answer: (-4,17) and (2,-1)
8 0
3 years ago
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Candace has $20 more than Amar. Their combined money totals $95. Write a system of equations represents this situation
STALIN [3.7K]

Answer:

Candace has $57.5 and Amar has $37.5.

Step-by-step explanation:

x+(x+20)=z

x+20=y

x+y=z

--------------

2x+20=95

2x=95-20

2x=75

x=75/2

x=37.5

37.5+20=y=57.5

5 0
3 years ago
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Lines Line A E and Line G H are parallel in the image below. The image will be used to prove that the sum of the measures of the
Ymorist [56]

Answer:

C - A AND H ARE CONGRUENT

Step-by-step explanation:

h and g are both 45 degrees and so is A. it should be this answer

8 0
2 years ago
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