Lets:
x=number of boys.
y=number of girls
We can suggest this system of equations:
x/y=11/13 ⇒x=11y /13
x=y-72
We can solve this system by substitution method
(11y/13)=y-72
lower common multiple=13
11y=13y-936
11y-13y=-936
-2y=-936
y=-936/-2
y=468
x=11y/13=11(468)/13=396
There are 396 boys and 468 girls in this school,
number of kids=number of boys + number of girls.
number of kids=396+468=864
Answer: there are 864 kids in this school.
She will be ready at 7:45 am.
1 1/4 hour = 1 hour and 15 minutes ( 1 hour divided by four is 15 minutes per quarter)
adding that to the initial time of 6:00am you get the time to be 7:15am adding the 1/2 an hour which is 30 minutes. Your final answer is, she will be ready at 7:45am.
Although we do not know the exact values of the zeros, we can find them by plugging our answers back into the equation. After process of elimination, we come to our answer which is C. Process of elimination is a test taking strategy which often helps in math, especially when quadratic formulas are present.
Answer:
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
draw a right angled triangle with the right angle in the bottom left
label P as the bottome left corner and write its coordinates next to it
do same with Q
the length of the triangle is 4 (8-4 = 4)
the height is 10 (12-2 = 10)
use pythagoras to work out the hypotenuse:
