The phrase "are steep enough" is correct and usable in written English.
It can be used to describe a degree of steepness that meets a certain requirement or expectation.
Example: "The hills in this area are steep enough to challenge even the most experienced hikers."
Alternatives: "are sufficiently steep" or "are adequately steep".
Despite the unpromising location, however, its prices (and this is a theme at all the chip shops in Brighton) are steep enough to give visiting northerners vertigo: £7.20 for chips and a small haddock.
First-time buyers Jeremy Gray and Aisling Ward, both 24, think property prices are steep enough without having to pay a hefty stamp duty bill on top, so they will be disappointed by the chancellor's decision to leave thresholds at their current levels.
If they are steep enough or last long enough, they can trigger recessions, as happened in 1973-74 when OPEC tripled oil prices overnight and in the 1980s when oil prices stayed above today's prices in real terms for seven years.
The requirements for the program are steep enough to sound almost like science fiction: the device must extract "a minimum of 2,000 liters of water per day from the atmosphere using 100percentt renewable energy, at a cost of no more than 2 cents per liter".
Our results imply that mutations causing changes in the maximum production rate or the relative decay rate, but keeping the threshold of regulation intact, may have almost no phenotypic signature if the regulatory dose-response relationships are steep enough.
Jones's lawyers have argued that the consequences of her plea have already been steep enough.
The field house itself is steep enough to evoke the intimate madness of Market Square.
The incline at the edge of the baseball field is steep enough for thrills but short enough that little ones won't have time to get scared.
This economic downturn has been steep enough and frightening enough to undermine the idea that the stock market, over time, will always deliver.
