The phrase "a double interest" is correct and usable in written English.
It can be used when referring to having two interests or concerns in a particular subject or situation.
Example: "Her involvement in both environmental conservation and urban development reflects a double interest in sustainable living."
Alternatives: "dual interest" or "twofold interest".
There is a double interest in doing so: to improve English Competence among Spanish students and to offer an attractive study plan to foreign students, especially for incoming students under the Erasmus Programme.
"A leading engineer and manufacturer of high-quality, flexible pipeline products for oil and gas transportation in the susbsea production industry," Wellstream's acquisition demonstrates a double interest by GE to both tap the deepwater drilling business and enter one of the world's most dynamic economies in the sector, Brazil.
Furthermore, individuals seeking higher education are met with deceptive private loans from big banks, or a government trying to double interest rates on subsidized Stafford loans this July 1st.
She says that her strength as a teacher comes from her lifelong double interest in science and the arts.
Because recording offices are usually closed on the weekend, borrowers who close on a Friday are especially likely to pay double interest for several days.
Bank of Ireland is offering ordinary savings account holders rates of 3.25% and an eye-watering rate of 6% in a "double your interest rate" deal for those who leave their money on deposit for two years.
The characterization of scenarios has a double practical interest.
Abdulhafid Zlitni said the government would double interest rates in the next week in an attempt to encourage citizens to stop hoarding money at home and deposit their cash in banks.
In the real world, this would roughly double interest charges.Economists will be interested in the results.
No doubt Leeds United fans will be lobbying the monetary policy committee to double interest rates so Glazer can't afford the payments, pushing Manchester United into administration.
"Minutes after Scott Brown voted with his Republican Party to double interest rates on student loans, he ridiculously attacked Elizabeth Warren with questions that have already been answered".
