2x+y=25
3x-y=20
solve by adding these two equations together
2x+3x=5x
y-y=0
25+20=45
you get left with
5x=45
divide both sides by 5
x=9
then plug x=9 into one of the 1st equations to solve for y
2(9)+y=25
18+y=25
subtract
y=7
so your numbers are 9 and 7
Answer:
Solution:
<u>Let's use PRT/100 to find the simple interest.</u>
- 3500 x 7.5 x 3/100 = Interest
- → 35 x 7.5 x 3 = Interest
- → 35 x 7.5 x 3 = Interest
- → $787.5 = Interest
Hence, the simple interest is $787.5.
The is the concept of algebra, the weight of the spring can be modeled by the equation;
w=0.9sqrt E
where;
=energy in joules;
thus the weight of the spring when the energy is 12 j will be:
w=0.9sqrt12
w=3.18 g
Answer:
V=1/2 cm
Step-by-step explanation:
V=l×w×h
V=2 cm×1 cm×1/4 cm
V=1/2 cm