MATHEMATICS HIGH SCHOOL

A number is chosen at random from 1 to 10. What’s the probability of selecting a odd number

Answers

Answer 1

Answer:

Answer:

There is a 50% chance of selecting an odd number.

Step-by-step explanation:

Total number of possibilities = 10.

We want to find Probability of selecting odd:

Favourable possibilities are:

1 or 3 or 5 or 7 or 9. (Total 5 possibilities).

Therefore Probability = 5 / 10 = 1/2 or 50%.

Answer: 1/2

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There are 75 students enrolled in a camp. The day before the camp begins, 8% of the students cancel. How many students actually attend the camp?Enter the correct answer in the box.

Answers

Answer: 69

Step-by-step explanation: Percent multiplied by the total number of students: 8/100 x 75 = 600/100. (remember it is 8/100 because it’s 8%.)

Then you simplify which will then get you 6.

Afterwards you need to subtract those 6 students from the group of 75. 75-6=69. So, 69 students.

What is the center of the circle x² + y2 - 16 = 0?

Answers

Answer:

(0,0)

Step-by-step explanation:

x^2+y^2=4^2

center: (0,0)

radius=4

PLEASE ANSWER ASAP! YOUR ANSWER MUST INCLUDE AN EXPLANATION IN ORDER TO RECEIVE 10 POINTS AND THE BRAINLIEST! THANKS!!!

Answers

the equation formula of the circle is (x-h)^2 + (y-k)^2 = r^2
where (h,k) the point of the center of the circle
and (r) is the radius of the circle
so if the center of the circle = (-2,-4)
by subs. in the formula we get (x-(-2))^2 + (y-(-4))^2 = r^2
then the equation will be (x+2)^2 + (y+4)^2 = r^2
now we want to define the radius of the circle r
since point (3,8) lay on the circle so we can
then subs. in the equation to get the radius
(x+2)^2 +(y+4)^2 = r^2
(3+2)^2 +(8+4)^2 = r^2
25 + 144 = r^2
r^2 = 169
r= 13
the radius of the circle is 13
so by subs in the equation we get
(x+2)^2 + (y+4)^2 = 169
so it is the first answer in the choices

Find the value of 5p + 2q when p= 4 and q= -7

Answers

(5x4) + (2x-7)
20 + -14 =6

If U=pi(r+h),find r when U=16 1/2 and h=2
solve this question by taking the value of pi 22/7

Answers

U=π(r+h)
r+h=U/π
r=U/π - h

Data:
U=16 1/2=16 + 1/2=(16*2+1)/2=33/2
h=2
π=22/7

Then:
r=U/π - h
r=(33/2)/(22/7) - 2
r=(33*7)/(2*22) - 2
r=231 /44 - 2
r=(231-2*44)/ 44
r=(231-88)/44
r=143/44 = (3*44 + 11)/44=3 11/44

Answer: r=143/44 or 3 11/44

U = π* (r + h ) [ : π

$(U)/( \pi ) = r + h \n \n r = (U)/( \pi ) - h \n \n r = (16,5)/( \pi ) - 2 \n \n r = (165)/(10) : (22)/(7) - 2 \n \n r = (33)/(2) * (7)/(22) - 2 \n \n r = (3)/(2) * (7)/(2) - 2 \n \n r = (21)/(4) - 2 = 5,25 - 2 = 3.25 Answer r = 3,25$

What value of c makes x^2 +5x+c a perfect square.

Answers

$Perfect\ square:a^2+2ab+b^2=(a+b)^2\n\nx^2+5x+c=x^2+2x\cdot2.5+c\n\nTh\e coclusion:c=2.5^2=6.25\n\nthen\ x^2+5x+6.25=x^2+2x\cdot2.5+2.5^2=(x+2.5)^2$

To find a perfect square, all you need to do is divide the second coefficient by 2 (5 in this case) and then square it. In other words:

5/2=2.52. 5^2=6.25. Thus, x^2+5+6.25, and in factored form, (x+2.5)(x+2.5)

Hope this helps!

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