Answer:
a) x = -270
b) y = 304/9 or y = 33.78
c) x = -37.8
Step-by-step explanation:
y varies directly with x so y = kx
a)
y = kx
k = y/x
k = 10/-30 = -1/3
So
y = -1/3 x
If y = 90 then
90 = -1/3 x
x = 90 *(-3) = -270
b)
k = y/x
k = -19/-4.5
k = 38/9
So
y = 38/9 x
If x = - 8 then
y = 38/9 *(-8)
y = 304/9 or y = 33.78
c)
k = y/x
k = -4.3 / 12.9
k = - 1/3
So
y = -1/3 x
If y = 12.6 then
12.6 = -1/3 x
x = 12.6 *(-3)
x = -37.8
Here is an example(i don't really know how to explain)
We know that
The Sun makes a complete circle in the sky approximately every 24 hours, while the stars make a
complete circle in the sky in 4 minutes less time, or 23 hours and 56 minutes
<span>Sirius is a star
so
</span><span>If Sirius rises at 8:00 pm tonight
then
tomorrow </span>will it rise at ------> 8:00 pm -4 minutes----> 7:56 pm
the answer is
7:56 pm
Answer:
43% of the students prefer biology
Step-by-step explanation:
Among girls:
39 of the students are girls.
21 of the girls like biology best.
Boys:
100 - 39 = 61 are boys.
16 prefer physics
11 out of the 34 who prefer chemistry are girls, so 34 - 11 = 23 are boys.
61 - (16 + 23) = 22 prefer biology.
What percentage of the students prefer biology?
21 boys and 22 boys, that is, 43 students out of 100. So
43*100%/100 = 43%
43% of the students prefer biology
Answer:
2
Step-by-step explanation:
I gotcha.
so.. you have to get your hands.
these are your fingers down below
| | | | / \ | | | |
so you count 1...2..
then that’s your answer!!
