(9r - 5 ) - ( -4r + 9 ) Can you subtract the expression
2 answers:
You might be interested in
Answer:
The right solution is:
(a) $1,940
(b) $2,813
Step-by-step explanation:
Given:
Invoice amount
= $8,400
Discount 1
= 33.33%
Discount 2
= 12.5%
So,
The net payable amount will be:
=
=
= ($)
Now,
(a)
Amount paid will be:
=
= ($)
Balance still to be paid will be:
=
= ($)
(b)
Amount paid will be:
=
=
= ($)
Balance still to be paid will be:
= ($)
Thus the above solution is the appropriate one.
Answer:
311.6 cm
Step-by-step explanation:
To solve this problem, let's call:
k = Keith's height
n = nephew's height
Since the ratio is 15:7, we have
(1)
Then, Keith's height is increased by 16%, so the new height of Keith is
(2)
While the nephew's height is doubled:
(3)
We also know that Keith is now 34 cm taller than his nephew, so
(4)
Substituting (2) and (3) into (4), we get
And substituting (1),
Solving for n,
So the current height of the nephew is:
While Keith's current height is
So their total current height is