# Jaji's annual income from two investments is \$2280. She invested part of his money at 4% nda n amount three times as great at 5%. How much did he invest at each rate? Sir/Maam show your solution pls

1
by jeblang
where's the problem?
Jaji's annual income from two investments is \$2280. She invested part of his money at 4% and an amount three times as great at 5%. How much did he invest at each rate?
wait

• Brainly User
2015-09-16T23:46:30+08:00

### This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let the principal amount be x

Amount invested at 4% = 0.04x
Amount invested at 5%, three times as much as the amount in = 3 (0.05x)
Total income from the two investments:  2,280

0.04x + 3(0.05x) = 2,280
0.04x + 0.15x = 2 280

0.19 x = 2 280

0.19 x = 2, 280
0.19       0.19

x = 12,000

Amount invested at 4% (x),  is \$12,000
Amount invested at 5%
3x = 3 ×12,000 =  \$ 36,000

To check the interest earned:
at 4% = 0.04 × 12,000 = \$ 480
at 5% = 0.05 × 36,000 = \$ 1,800

Add the interest: 480 + 180 = 2,280

Maam makakatulong po ba pag gagawa ka ng table ?
Ok. Only for this one.
table posted.