Answer:
1)
(a) 19 44
(b) 3.96 m
2.01 x 90%= 1.95
1.95 + 2.01
(c)
i] 6
2 events *3 medals per event
ii] 60
simple ratio
iii] 20 including marathon run and high jump events
2)
(a) 8.5 cm
closest round off figure
(b) 4/3πr²
4/3 x π x (8.5)²
303 cm³
Answer:
d
Step-by-step explanation:
it's the only one that isn't a trend
5x+7y=25
5x-2y=-65
subtract both of the equations
5x-5x=0
7y--2y= 7y+2y=9y
25--65=25+65=90
0+9y=90
9y=90
divide both sides by 9 to get y by itself
9y/9=90/9
cross out 9 and 9 which becomes 1*1*y=y
90/9=10
y=10
find x by using the substitution method
5x+7y=25
5x+7(10)=25
5x+70=25
move +70 to the other side
sign changes from +70 to -70
5x+70-70=25-70
5x=-45
divide both sides by 5 to get x by itself
5x/5=-45/5
cross out 5 and 5 then becomes 1*1*x=x
-45/5=-9
x=-9
answer:
(-9,10)
Your answer is 9.
Since you have
2(2)^2 you get 2(4) which is 8.
Then you have -3(2) which is -6.
Lastly you have the 7.
When you add it up you get.
9
The answer is 41731620000
